I had a weird idea while recently listening to King Missile's "Detachable Penis."
A young guy (you) wakes up one morning to find his genitalia gone. Just gone. Not cut off or anything that would otherwise leave him mutilated and scarred - just flat, smooth skin from his navel all the way down between his legs. He hears a voice in his head from a supernatural entity (me) informing him that I have taken his equipment, but that it still functions perfectly and that he will still feel everything done with it. During the following days, he is treated to psychic visions of where his penis has gone, who it has been given to, and what they're doing with it - all the while he feels everything perfectly.
Admittedly, this idea is little more than an excuse for successive scenes of sex with a disembodied penis. Knowing this up front, any takers? PM me. Maybe even a few extra people to play individual scenes as recipient of the mysteriously still fully functional disembodied member...?