I sometimes notice myself forcing jokes/pua skill sentences to a girl I like. If I don't do this with the girl I like I become boring and ask a lot of common questions.

But... when I have a girl who likes me a lot and I like her a little, I become an instant comedian and have this epic game.

Also, I tried to test some of the same jokes on girls I like and somehow they don't respond the same way the other girls do.

Is there an explanation for this?