Not trying to toot my horn here, but I've gotten many compliments before. Or they would do something sweet like Nutely said, keep her eyes open during missionary and stare at me, or pull me in and touch my face, or make time to cuddle afterwards and stare at my face. But I think the best compliment I've gotten to date so far was one of the girls telling me I had a beautiful penis.
So fuck that if they tell you you're handsome, that's not worth anything from them or anyone at that matter. But if you get a compliment of the aesthetics of your penis, I'd say thats worth something. Especially if it's coming from a girl who sees multiple dicks a day, to compare to.