What is You Know You Want It?
1.
What a man says to a woman (usually a virgin) when she intends to have any kind of sex with him, but has doubts whether it is the right thing to do.
The phrase is intended to encourage the woman to give up her doubts and have sex, because she wants it herself.
Jennie intends to give Kevin a blowjob, but she isn't sure whether to do it or not.
-Kevin, I am not sure about this...
-Come on, you know you want it!
See
2.
A phrase where a desperate man is trying to seduce a girl so she can be another notch in the bedpost, but listen guys
cos ALL girls dont necessarily want it. It really pisses me off that you assume that all we want is sex or that "we say no but we really mean yes" it wont give up our doubts but it will give up our dreams (when you pressure us in the case of full-blown sex) so when we say no it MEANS no look it up in the goddamn dictionary.
Joe: ready to take the next step babe? (kisses Jill heavier and heavier)
Jill: I'm not ready yet, to give up my dreams of becoming a doctor we should wait a while, we're not mature for sex yet but when we are it'll be really special.
Joe: common you know you want it you prude
Jill: *slaps joe* grow up you pig and leaves joe with his right hand.
See