Commissions 10$ per 500 words. 

Dear Y/N, I loved that picture of your huge cock. I think it might almost be *too* big, I would be super sore if I rode you like that… I can’t stop thinking about shrinking that big nasty thing. I think first I would test the waters by stroking you off with estrogen cream. After a week or two you would lose a few inches and have a softer, more feminine erection.Your frenulum will get sickeningly sensitive, no way to keep your whimpers down while I'm licking down on it. Your girly cock will get wet for me, leaking just like a pussy. Now I can see how excited your body gets by slowly having your masculinity broken, your nipples are perking at every touch and your jaw is trembling as you bite your lip. At once, I knew you were ready to take it all the way.
I massage your heavy nuts and smirk. The warmth of my palm coaxes your muscles to relax, balls descending to their lowest hang. I snap a rubber band suggestively with my finger and thumb before winding it to the brink of snapping. It's so tight that I have to squeeze your sperm factories through one at a time. You wince as the bondage collapses onto your cords, cutting off the blood supply. I equip a wooden paddle and slap your choking scrotum, you yelp at the throbbing pain. It hurts the first time, but after 30 minutes of periodic beating you are numb enough for it to be a dull pleasure. I put the paddle down and unsheathe a scalpel. I know this is scary, so I coo and caress your princess wand to comfort you. I stretch the skin around one organ and make an incision, exposing soft pink tissue and small beads of blood. A few more strokes and it’s free from the connective tissue. 
When both testicles were cut free I pulled them to the ends of their cords, they hang an impressive length from your body now. I look up into your eyes, there is no going back after this; you may be able to get to a hospital and have the poor things revived if you said that pretty little safe word right now. You stay silent. I unzip my pants and aloofly stroke my own T-dick. Your eyes are intent on my hands as I slice a gash into one tunica and then the other. The tubules inside are now puffing out of the wounds on each ball. I take one in each hand and line my cock up with the slits, beginning to move my hips. I slowly start to fuck your ruptured testicles. The delicate tubes that carried your fertility are being reduced to mush by my throbbing shaft plunging in and out. As I orgasm my grip tightens, pulverizing what was left of your manhood.
After that fateful evening I cleaned you up well, even letting you cum inside me one last time while your penis could still achieve an erection. Although I’ll admit, I think we both enjoyed sex together a lot better after your neutering. I love sliding your soft clitty against my hole, then watching it twitch with long dry orgasms!