The road to hell is paved with good intentions.

Responding to [http://genius.wikia.com/wiki/And_you_know_I_can_tell_that_you_like_it_and_that_it%27s_good_by_the_way_that_you_move. his cockiness], she explains that wanting to have sex with someone, no matter how badly, is not necessarily enough to have "good" sex with them. You need skill to satisfy someone.