I got assfucked by a group of freightyard hobos once as I tried to hop a train. I was crouched in some shrubs freezing my ass off and waiting to make my move. I heard some noise behind me and before I could do anything one of them had me pinned down with my ass in the air and the other two started working on my pants. I didn't want to scream for fear of getting caught, so I kept my mouth shut, grit my teeth, and took it like a man.
I was bent over doggystyle on my knees, so one would straddle my shoulders to keep me pinned while one would work my ass and the other took my mouth. It lasted about fifteen minutes, was pretty humiliating. I remember being sort of happy for the warmth, but I think that was just hysterical rape victim thinking.
All three shot their loads inside me, one in my mouth and two in my butt. I got tested a few months later, no HIV or STDs thank god.
I haven't gone hopping since