I come home to you earlier than I expected. You explain that you know exactly where I've been and exactly why I'm home early. You know I've been cheating with several girls. Today I've begun to pay the price. When I went to my girlfriend's apartment, instead of the marathon love-making I'm known for I was barely able to make my partner cum once before pathetically pulling out and skeeting all over her. Somehow, you know what happened. You taunt me with it. You pull down my pants and take out my cock. You tell me to check right under my balls for a little scar. You explain this is an injection mark. You've given me a 10X overdose of a serum meant for men with irreparably injured testicles. You explain that I've only started to be effected. Unless you give me the antidote, my balls will become so supercharged they will produce a month's worth of semen every day. I will have permanent blue balls and such a quick hair trigger I could never hope to please a woman ever again. You reference how whenever we have fought in the past, I just let my dick do the talking and fucked your brains out. You tell me that if I can just do that one more time you'll give me the antidote. You strip and aunt me with your amazing body. Desperate, I grab you and try to take you from behind as I used to. The moment I'm inside you I have to freeze. It takes all of my effort just to hold onto my wad. You laugh at me and taunt me with sarcastic encouragement before taking matters into your own hands by humping back at me. Almost instantly, I explode inside you as you laugh. You pull off, commenting how obscenely large a load I just shot and you start to lay out how my life is going to go now that you've taken me from stud to dud. I inject you with a serum taking you from stud to total dud as punishment for cheating!