There's been a lot of rumours out there saying it's bad. But I just found these videos on youtube from "Sports Science" where they test myths. You should actually be better if you've had sex the night before a game. Sports Science - Episode 7 Just thought it was interesting, and too see what others though. There's a lot of people on either side of the fence. For my case, whenever I can use the excuse to have it... I use it.