Why do people slap their knee when they laugh?

Answer 1

if you know it and your happy "clap your hands"

Answer 2

Because it would be a bit awkward to stand there and laugh. Well, I think it would be. But that's jus what i think. Hope it helps x

Answer 3

People clap their hands along with the music for a number of reasons. Some musicians ask audience members to clap along for example.

Answer 4

People need a physical outlet to express their exhileration over a humorous moment. They slap their knee instead of slapping someone else.

Answer 5

because they are bums