scarred4life said:
Any tips would be helpful, BTW.
'Practice' having sex (and you know what I mean by that) in the location and approximate time you plan to have sex. Do it while imagining your fantasy.
Then when you have sex, the sights, sounds and smells of the place you 'practiced' should help to get you aroused enough in anticipation to get through the actual act itself. (NOTE: It may take more than three weeks of 'conditioning' to your mind in the right place at the right time).
Then what you do in your own mind while having sex should get you through the rest. It's also best to do it when you're tired so you don't over-think it and lose momentum (as it were). Hope that helps. That's some free sex therapy advice right there.