If you want a one time fix a minor induced opiate withdrawal will work.

Take any opiate 24 hours before you plan on having sex. It will shut down your pain and sex centers.
But when it wears off your nerves will becomes ultra sensitive to touch, to the point where spontaneous emissions may occur, and you'll be horny as all fvck. Again I'm not saying this is the right thing to do, or even a good idea, but I mentioned it because it works. Take a vicodin 24 hours before you have sex, when it starts to wear off YOU WILL BLOW AND BLOW QUICK.