1st date: Hanae Mori HM
3rd date: Royal Oud
Any date: Tom Ford For Men
I list those three because the key to seduction isn't a scent. It's personality and, to a lesser extent, style. Scent plays a role though, of course. The trick is to know enough about the person you're with to know what she (or he if that's the case) will love. I've gotten such positive feedback from women when I wear TFFM that I'm surprised it doesn't get more love here. This one's seriously criminally underrated. I'm amazed by how great the feedback I've gotten from women has been.
I would have added Gucci Pour Homme to my list if you asked for more than just three. Bvlgari Black too. As for Aventus...? I've gotten a lot of comments like "That's nice," but never anything sexy. Even Varvatos Vintage has gotten much better feedback for me than Aventus. But that's fine. I wear Aventus for myself... but when I want to smell great for a date, I usually choose one of the three I listed above.