"Harry Burns: What I'm saying is - and this is not a come-on in any way, shape or form - is that men and women can't be friends because the sex part always gets in the way."
"Sally Albright: You say I'm having sex with these men without my knowledge?
Harry Burns: No, what I'm saying is they all WANT to have sex with you."
"Harry Burns: Because no man can be friends with a woman that he finds attractive. He always wants to have sex with her.
Sally Albright: So, you're saying that a man can be friends with a woman he finds unattractive?
Harry Burns: No. You pretty much want to nail 'em too.
Sally Albright: What if THEY don't want to have sex with YOU?
Harry Burns: Doesn't matter because the sex thing is already out there so the friendship is ultimately doomed and that is the end of the story."
Not exactly rated PG-13 (High School), but the basic argument is there. I love that scene, and if I had to be honest myself... I have a bunch of girl-friends. I won't lie and say I haven't liked some of them, or have been attracted to them. My last girlfriend was actually a friend, that I made a move on. I generally argue with Harry's statements, although not to that degree.