A gorgeous blonde just said your dick makes her hot. Don't talk. Don't think about it. Just fuck her.

Well... yeah!

That does seem like the obvious choice for a horny 18-year-old virgin, doesn't it? Dave should definitely do that.

If this were in game mode, I'd give you some points. It's not, so here's another picture of Tracey instead.

It's not as narratively interesting as the other choices though, so feel free to go back and pick another.