Zeebop
CHYOA Guru
One of the things about a sex scene is that it doesn't have to involve penetration, and it doesn't have to continue until completion. Humans are those unique animals that can have sex while fully clothed across a crowded room, if conditions are right and they're in a mood. The mechanical in-and-out itself, for all that it is often exalted, is usually a lot less fun than some of the challenges of getting to the point where all parties concerned are in a place to do that...and there's a lot to be said for emphasizing the sense of expectation more than of actual fulfillment. Even when people have sex, it's not a static activity - people move around, after all, jockeying for the right position, angle, and stimulation. The intensity builds throughout the act - and whether that builds toward climax, or coitus interruptus, or disappointment, or frustration on the part of any individual involved is all part of the game.