Mounted by the Alien Demon: A Gay Science Fiction Tale

It has been three weeks since space pilot Dustin has gotten any action, so he's happy to finally get his ship into port. But his plans for some recovery debauchery get derailed when he is commanded to transport aliens in the shape of tall, ripped demons to a diplomatic summit. These demons are so hot he can almost taste it...but then he finds out they have taken a vow of chastity for their mission, and they expect him to as well.

Then, it turns out one of the demons can't keep a vow any better than Dustin can, and soon Dustin is learning what it means to be mastered by a huge, hot devil.