How about POW torment and torture stories. Degrading, humiliating forced erections and ejaculations through electro stimulations before finally having it all cut off.

I always thought a WWII pow story would be hot. Hot young guys raped and genitally and anally tortured. Maybe pit two POW's against each other. These guys must try to rape each other. the one who ejaculates up the others ass is the winner. the loser is painfully tortured and snuffed. There are all sorts of scenarios in a POW camp.