My hypothesis is that humans are genetically predisposed towards reproduction, and that pursuit of reproduction subconsciously motivates nearly everything we do. Sexual hunger builds until temporarily satiated, as does the motivation to satisfy it. Therefore, consciously defer sexual gratification to fuel subconscious motivation.
Olympians get it. These highly-motivated individuals abstain for long stretches of time to maintain focus and drive for arduous training, culminating in the post-competition bacchanalia that is the Olympic village.
Also, from a male's perspective, semen has evolved to give spermatozoa the best shot at reaching the egg. It is high in nutrients that rest of your body needs for training and recovery. It is possible to screw your way into anemia. I believe applause are in order if that's the scale of your game, but understand your priorities.