What's the difference between saying a fork in Cantonese and saying a spring? What do you mean by fork and spring?

In fact, fork and spring have no specific meaning in it, so they should be regarded as modal particles.

I'm not sure when the fork is used alone, but spring refers to a man's balls.

It's a bit vulgar to add forks and springs. Under normal circumstances, we only say "baa"-what's the matter, but when a person is a little impatient or used to swearing, he will say "baa".