Taking it up the dirtbox for sexual kicks, usually with a group of masturbating masked men looking on and stroking their meat!
"I was wondering what I could do to warm up my rectum on these chilly gay Autumn evenings and why, what better activity could I think of than calling up the boys and having them come round for a spot of bumming? They were at it for hours until my poor old butt was red raw. This morning I had to put on an adult diaper because I couldn't keep the shit up my arse such was the fun I'd had yesterday evening. Being gay is such fun. I love bumming!"