My roommate (rm) this morning suddenly give me this riddle,
rm: Hi, good morning! I have a nice riddle for you
me: Seriously? Isn't this too early?
rm: 'mon, just guess who I amYou change me once, You'll find me on your phone or next to it
You change me twice, You'll find me on the sea or behind it
You don't change me, because you trust me
You can change me, because I trust you
They said, those two things that make me existWho am I?
Inspired by the answer of @JaredLovin, I believe the answer is
wife
You change me once, You'll find me on your phone or next to it
The wordplay tag applies here.
"On your phone": Wife -> Wifi
"or next to it": Wife -> Wire (solved by @guillau4)
You change me twice, You'll find me on the sea or behind it
Again, wordplay.
"On the sea": Wife -> Wave
"Or behind it": Wife -> Tide or Wife -> Wake (solved by @pt314)
You don't change me, because you trust me
Normally, someone becomes someone else's wife for the person she is. Trust is a big part of that.
You can change me, because I trust you
Because trust plays such an important role, trying to change your wife is typically for the better.
They said, those two things that make me exist
Mutual trust or husband & wife?
The 3 introductory lines might hint at
that this is more than just a roommate. Given that it is so early, the two may still be lying in bed together, slowly waking up.
Could you be. Just for fun :p
Shorts?
You change me once, You'll find me on your phone or next to it.
A clumsy room mate throws shorts wherever he likes after removing it or changing it -even on phone or sometimes next to it
You change me twice, You'll find me on the sea or behind it.
There can be many scenarios - I'll leave up to reader's imagination :p
You don't change me, because you trust me.
Obviously we trust shorts that it will do its job of covering (and won't torn etc) :p
You can change me, because I trust you.
But yes you change also
They said, those two things make me exist.
Shorts has two openings to easily insert your legs inside-two legs make it exist. It is made up of cloth and elastic. :p
Title:
My roommate's short riddle.
It is short - see shorts
Conversation:
rm: Hi, good morning! I have a nice riddle for you.
Morning is a time to change shorts
me: seriously? Is this not too early?
Describes some prefer to not change shorts so early in the morning
rm: c'mon, just guess who am I :)
c'mon, is the short form of come on
Answer:
Roommate or to be more precise rm
You change me once, You'll find me on your phone or next to it
change the r in rm to am and you will see it on your phone or on your alarm clock that is sitting next to it.
You change me twice, You'll find me on the sea or behind it
change the a in am to pm you would have changed it twice and you will find it on the other side of the planet which could easily be in a body of water
You don't change me, because you trust me
You trust your roommate so you wont change your rm with someone else. An alternate: PM is not only short for Post Meridiem, it is also short for Prime Minister so don't change it. Hopefully you trust your prime minister.
You can change me, because I trust you
You can change the acronym rm you use to describe/address him to something else, because your roommate is trusting you will not start calling him by something silly or derogatory. First alternate: You can change the m in pm to pc to get personal computer. Personal computers trust you when you open it up and start changing parts in it. Second alternate: Change the m in pm to pz, to get puzzle. malioboro is trusting us with swapping letters in this puzzle to come up with a solution.
They said, those two things that make me exist
R and M without them rm cannot exist
Other notes:
I strongly suspect that I missing some other acronym variations for the change me parts that would make for a better answer. Like tm being trademark, which is something you do not change.
I think the answer is
LOCK
You change me once, You'll find me on your phone or next to it
LOCK -> CLOCK
Most phones have clocks on them, or you can have a clock on your desk
You change me twice, you'll find me on the sea or behind it
CLOCK -> DOCK or LOCK -> DUCK
Docks and ducks are both found on bodies of water including seas. They both can also be found along the edges of a body of water and thus are behind it.
You don't change me, because you trust me
You trust your locks to keep you safe, so you don't need to change them
You can change me, because I trust you
You can change/unlock a lock because you are trusted with the key
They said, those two things that make me exist
Not sure on this one either...
Could you be
Time?
You change me once, You'll find me on your phone or next to it.
If you change the time once, you might find the "new" time on your phone or beside it, depending on where your phone is.
You change me twice, You'll find me on the sea or behind it.
If you change the time schedule on your phone (once) and then on your calendar (twice), you might be seeing the sun over the sea or over the horizon (behind it), depending on what your schedule is.
You don't change me, because you trust me.
We trust that a minute is 60 seconds; an hour is 60 minutes; and that every four years we have a leap year.
You can change me, because I trust you.
We invented the unit of time. Time is all around us, but humans invented the duration of a second, and its definition. It is, on some level, our own creation, and it has no choice but to trust us. We are all beings of time; our lives move forward in time.
They said, those two things make me exist.
Yes, and that is exactly what I said, too. It is because of us that we can measure time and understand its existence.
Title:
My roommate's short riddle.
It is short; it takes a short period of time to read it.
Conversation:
rm: Hi, good morning! I have a nice riddle for you.
Morning is a point in time.
me: seriously? Is this not too early?
Describes what point in time, morning is.
rm: c'mon, just guess who am I :)
c'mon, meaning "don't waste your time and get on with the riddle."
Note the wordplay tag. Answer:
LIKE
You change me once,
LIKE -> LINE
You'll find me on your phone
refers to lines drawn on the screen, or the connection during a call
or next to it
"phone line"
You change me twice,
LIKE -> LAKE -> LANE
You'll find me on the sea or behind it
"sea lane"
You don't change me, because you trust me
LIKE
You can change me,
LIKE -> FIKE
because I trust you
"fike" means to flatter.
Alternately, LIKE -> L**U*KE, "Trust the force, Luke!"
They said, those two things that make me exist
{BIKE,DIKE,PIKE,SIKE,LAKE,LOKE,LIFE,LIME} -> LIKE all exist
Could it be
your significant other
You change me once, You'll find me on your phone or next to it
You just started going out with them, which makes a change in their life. They could be next to your phone physically or have a picture of them as your phone's background/screensaver.
You change me twice, You'll find me on the sea or behind it
You've dumped them, making a second change to their life, and they will move to a different continent.
You don't change me, because you trust me
You don't change your SO because you trust them.
You can change me, because I trust you
They are willing for you to change some aspects about themselves because they trust you.
They said, those two things that make me exist
Their parents? I dunno.
is the answer
a clock
You change me once, You'll find me on your phone or next to it
when you change any measurements smaller than a day (seconds, minutes, hours) you have to take another clock as the reference to fix it
You change me twice, You'll find me on the sea or behind it
when you change any measurements greater than or equal to a day (days, months) you have to take the sun as the reference to fix it.
You don't change me, because you trust me
you don't change your clock's settings as long as you trust it
You can change me, because I trust you
clocks let users change their settings for many reasons
They said, those two things make me exist.
clocks exist to keep track of two types of measurements mentioned above
NOTE: My answer is the first thing that came to my mind but I couldn't fully reason it. It is highly influenced by @user477343 's reasonings but since OP said his answer is not the intended one I wanted to give it a try.
Is the answer
a Key?
You change me once, You'll find me on your phone or next to it
You unlock your phone by entering a key pattern? After you unlock a door, you put the key in your pocket, next to your phone.
You change me twice, You'll find me on the sea or behind it
Not sure about this one, maybe if you lock something, it becomes unreachable like land beyond the sea?
You don't change me, because you trust me
You won't get a different key as you know only this one works with the lock
You can change me, because I trust you
You are the only one that will get a replica as you trust no-one else has a copy
They said, those two things that make me exist
"SHUT THE DOOR!" Is what you and your girlfriend said when your roommate walked in early in the morning. A key exists to keep a "door shut". You forgot to lock your bedroom door apparently.
Cheers
Here goes my try, heavily inspired by @emre-Ünsal and @user477343 answers
You are an Alarm Clock
You change me once, You'll find me on your phone or next to it
when (you hit snooze / set a time) on your alarm clock you do it on your phone or in a proper alarm clock presumably next to it
You change me twice, You'll find me on the sea or behind it
No clue, on the sea or behind it... Something related to turning off your alarm and it sounding the next day?
You don't change me, because you trust me
you don't change your alarm clock because you trust it will wake you up everyday at the same time
You can change me, because I trust you
you can change it whenever you want
They said, those two things make me exist.
Alarms + Clocks = Alarms Clocks
Is the answer
Sand
You change me once, You'll find me on your phone or next to it
Sand can be changed or converted into a Glass. You can use it either in your phone as LCD display (or a tempered glass cover) or used as a glass (of water or any other liquid).
You change me twice, You'll find me on the sea or behind it
This glass can be changed or re-converted into sand by breaking it down into particles sized enough to be as small as sand (and removing the sharpened edges by abrasion). Or the broken down glass can be dumped as garbage into the sea (or ocean or waterbody).
You don't change me, because you trust me
You need not change sand, and can trust to walk over it or do anything with it as is.
You can change me, because I trust you.
You can change sand to many other things or materials, so sand gives its complete trust to do as you please with it.
They said, those two things that make me exist
This one I am not so sure but here it goes. Without sand, there would be no soil and in turn no plants and no life forms would exist.
Well, here is my take on it -(partial one)
You are Mr.
As,
You change me once, You'll find me on your phone or next to it
You can change me to mr - that too letters e and r are next to each other on one's phone(keyboard)
You change me twice, You'll find me on the sea or behind it
To be provided.
You don't change me, because you trust me
As, you are a Mister and hence trust-worthy!
You can change me, because I trust you
To be provided.
They said, those two things that make me exist
To be provided.
This was a very much square peg in a round hole after the first clue...
A (secret) code
You change me once, You'll find me on your phone or next to it
Change a password and you'll receive a 2FA code
You change me twice, You'll find me on the sea or behind it
Morse code. You can change the signal from dot to dash or dash to dot.
You don't change me, because you trust me
If a code is trustworthy, there's no need to change it
You can change me, because I trust you
You can change a code (meaningfully) only if you're able to decrypt it first
They said, those two things that make me exist
?
