I actually don't think the characters in this song are having sex yet. I think this is about a guy who sees a hottie on the dance floor and wants to sleep with her. He's afraid she's out of his league ("you are rhythm, I'm a cold shower"). He's imagining the seductive things he could say to her, but he needs time to get up his courage, and in that time, she could disappear. That's why he hopes she will wait.
I actually don't think the characters in this song are having sex yet. I think this is about a guy who sees a hottie on the dance floor and wants to sleep with her. He's afraid she's out of his league ("you are rhythm, I'm a cold shower"). He's imagining the seductive things he could say to her, but he needs time to get up his courage, and in that time, she could disappear. That's why he hopes she will wait.