Thinking about it...
Thinking about being on a road trip and having to stop at a rest stop.
I walk into the men's room and close the door but don't notice that the lock didn't latch all the way. Someone walks in while I'm still in the stall and hears me peeing. As soon as they hear the toilet flush they barge in and bend me over - taking me for their own.
Maybe they just breed me and they leave, maybe they shove a fist in me and destroy my holes before leaving me to be found by other real men, maybe they shove the toilet brush or other objects in me to see what I can take... I just want it so bad.