Here is a short rebus that I just created. Let's see if you can solve it.
Hint
it is an old proverb
Is it
One swallow doesn't make a summer
A very rude answer:
If the lady takes the pill, there will be no kids to take to the beach.
This might be a stretch but
You shouldn't eat before you swim? Because the picture shows the girl eating (pills) and then the beach picture is crossed out. Normally adults swim at the beach.