Burt: For most guys, sex is this thing we want to do. It's fun, it feels great, but we're not really thinking too much about how it makes us feel on the inside, or how the other person feels about it.
Kurt: Women are different?
Burt: Only because they get that it's about something more than just the physical. When you're intimate with somebody in that way, you're exposing yourself. You're never going to be more vulnerable, and that scares the hell out of a lot of guys, believe me. I can't tell you how many buddies I've got who've gotten way too deep with a girl, who said she was cool with just hooking up.
Kurt: But that's not going to happen to me, Dad.
Burt: No. It's going to be worse, because it's two guys. With two guys, you got two people who think sex is just sex. It's going to be easier to come by. And once you start doing this stuff, you're not going to want to stop. You got to know it means something, it's doing something to you, to your heart, to your self-esteem. Even though it feels like you're just having fun.
Kurt: So you're saying I shouldn't have sex.
Burt: Kurt, when you're ready, I want you to be able to do everything. But when you're ready, I want you to use it as a way to connect to another person. Don't throw yourself around, like you don't matter. Cause you matter, Kurt.
(Italics are mine for emphasis.)