Write a 10 chapter story one chapter with dialogue.  John a sexual man married to Sarah.  Sarah is asexual, fluid repulsed, doesn’t masturbate and is repulsed by John's 10 inch cock. John is frustrated because he hasn’t had pussy in years.  They compromise John would masturbate to porn openly while Sarah watched, John becomes a nudist and wanks practically all the time casually stroking himself not even stopping when friends come over.  
Sarah suggests he eat his ejaculate Sarah becoming more and more directive of Johns actions, they get into pegging which replaces Johns masturbation Sarah jokes he doesn’t need a penis anymore because her vagina was out of business and would look better without one.  
After much thought John decides to get a penectomy but keep his testicles. His cock is rock hard and huge when the doctor starts he ejaculates It is done under a local so John is awake the female doctor explains every step as john and sarah watch the operation, sarah and the doctor talk a lot about how much stump to leave sarah wants very little and talks about never doing penetration asks lots of question and john jokes when it is cut off and the doctor gives it to sarah, after sarah asks the doctor agrees to do a reroute so john sits to pee so his stump can be closed completely 
Sarah laughs in relief the first time she sees him naked happy his thing is gone.  She calls him nubby after seeing his hard half inch stump Sarah wanted everyone to know she wasn’t being penetrated ever again
Sarah becomes open to experimenting with new sexual activities. John struggles to reach orgasm, they start pegging and john eats cum from his new hole and eats it every night.  Sarah discovers she enjoys watching John cum out of his new hole and piss like a girl and doesn't mind sexual activities with her dickless partner 
John still feels his phantom limb and performs missionary and has sex sara with an imaginary erection
Sarah invites Emmy, Steve, and Lisa over.  John is naked.  They converse about his missing dick.  Sarah says it’s not missing and gets the jar with it inside to show to everyone.  everyone watches and encourages John to masturbate his phantom
sarah corrects people to eunuch when they call John a man
they go on a nudist retreat where people react to John’s emasculation
Johns friends from school are shocked he was dickless.   His friend Bob asks to see it
Sarah’s friends husbands get penectomies and bring over their own jars 
Now its common for men to get a penectomy be dickless bottoms at their wives urging often getting penectomies when their wife hits menopause or they are done having kids with some men opting for castration as well 
Steve is the first in their circle of friends to get the new cybercock installed.  The procedure is similar to John’s surgery steves cock is rock hard and huge when the doctor starts to cut he ejaculates It is done under a local so John is awake the female doctor explains every step as steve watch the operation, steves stump is an inch, much bigger than johns, to accommodate the base for the cybercock.
John didn’t have enough tissue so sadly he would have to stay dickless for life
