I'm the type of guy that loves to see a girl squirm in pleasure as I eat her out and will keep eating her out until she has an orgasm... My sign that she had an orgasm is when the girl's legs tremble, shiver, or she gets goose pimples going down her legs.
I understand that a girl can fake the bucking/squirming around or the moaning, but can a girl fake the legs trembling/shivering?
~ Professional kitty kisser