Have a few good orgasms when you are not training for a fight and when you are done ask yourself if you feel like fighting and the answer will be no. How can you enter a ring feeling like the whole world is your friend while the other guy wants to tear you limb from limb. Sex is the greatest feeling in the world but the last thing you'll do is watch your ass in the ring the next day. You won't have an edge because you will feel really benevolent to your fellow man instead of throwing punches in bunches.