Often when I'm around girls, and when possibly flirting I might make jokes. When they laugh I always get confused as to whether it means they are nervous around me, or whether they are laughing at my inappropriate comments, laughing away the awkwardness, etc. Girls laugh alot anyway so I try not to read into it too much. But its just that I always assume at first that they are laughing at me.. probably because of the fact that I didn't have alot of experience with girls when I was younger.. Debate
Woman can be a bit crazy, but by far the smarter sex. If a woman/girl thinks your funny she will laugh. Some may fake other things sometimes but laughing is not normally one.
If when laughing, the girls cover their mouths, point at you, and look at one another and then start laughing and pointing all over again, you might wish to try some new jokes.