# I can spread like a disease… Riddle

I can spread like a disease,

Only I can't kill,

Unless it's in a phrase.

Unless you've got skill.

But, I can still infect for many days

What am I?

Hint 1: Might give it all away:

If you add a letter to me, then I suddenly become more ghastly.

Hint 2: In case you need another:

No one can control me and they love it. Even psychopaths

• I'm guessing puberty XD I'm just kidding. Welcome to PSE! Please take the tour! – Prince North Læraðr Mar 19 '19 at 23:29

You would probably be

Laughter

I can spread like a disease,

Laughter is contagious!

Only I can't kill,

Laughter can't kill

Unless it's in a phrase.

Deadly/Killer laughter is a common phrase, not that it kills though ....

Unless you've got skill.

But, I can still infect for many days

Laughter is infectious

If you add a letter to me, then I suddenly become more ghastly.

S + laughter = Slaughter, which is horrific

No one can control me and they love it. Even psychopaths

Laughter is normally well received. Psychopaths/maniacs usually cackle with laughter

• The phrase is probably rot13(qvrq ynhtuvat) – Rubio Mar 20 '19 at 15:58
• i have never heard that phrase. – Jordan.J.D Mar 20 '19 at 16:25
• I'm thinking "I can never displease, Unless you've got skill" refers to rot13(gvpxyr gbeghr) – Birjolaxew Mar 20 '19 at 17:46

Are you

A host?

I can spread like a disease,

Only I can't kill,

Hosts can’t kill but the viruses do

Unless it's in a phrase.

Hosts aim to please at social gatherings

Unless you've got skill.

But, I can still infect for many days

Viruses in hosts infect for many days

Hint:

If you add a letter to me, then I suddenly become more ghastly. -> G + HOST = GHOST

• I think the skill hint has to do with rot13(tnzr fubj ubfg), can't figure out the phrase one though. – Jordan.J.D Mar 20 '19 at 16:30

Are you

Silence

I can spread like a disease,

Silence can be contagious

Only I can't kill,

Silence usually does not kill

Unless it's in a phrase.

A phrase like "Silence can be killer"

Unless you've got skill.

Silence could potentially be displeasing, like passive aggressive

But, I can still infect for many days

People might stop talking for many days

Hint 1

Silenced (silence + d) could mean murdered

Hint 2

If a person decides to be silent no one can make him talk

Are you

Words

I can spread like a disease,

Words can be contagious (gossip)

Only I can't kill,

Words don't usually kill

Unless it's in a phrase.

Words can make people suicide