LogFAQs > #979602841

Part of it is logistics, the more your prostate fills up with it's part of the seminal fluid the greater signal it sends to your brain that it needs to be evacuated.

Same way holding in your urine or fecal matter for too long can start to distress you.

When you finally clear it out your brain gets less of a signal so it has one less thing it has to manage which frees up mental resources for other things.

The other part is you overfocusing on certain aspects of life when you're aroused and reducing your compulsion to do something with that arousal reduces your focus on those sexy aspects of life.