then whats the point in having them here.to see if your handicapped or not?
No, they're used normally.
And as long as it's in moderation, and therefore not spamming, it's fine.
People use
and
to show appreciation (icecream is used much less often),
is used to show that you're joking,
can be used to show that you're sad (usually in a jokey way), and
is anyone's guess.