on the contrary, sex stimulates test production.
however, if you are doing alot of thrusting, you may weaken your glutes for leg day, and if you are supporting yourself with your hands in awkward Kama sutra-like positions, it may affect your bench, IMO.
So........just let her do all the work!!
and then eat her out and toss her salad before or after to make sure she has fun too.
peace.