Park Life

Had this fantasy for a long time...
I'm 'k**napped' and wake up naked and bent over a bench in a popular public park. I'm tied securely and a sign nearby reads "Use me in any way you want!" A ball gag keeps me silent but it can be easily slipped off by my abusers.
First would be the early morning dog walkers. The first one walks past, but soon returns to slap on some handily placed lube before fucking my arse. He soon comes inside me before scuttling off. Soon more arrive, women as well as men. One bitch eases her hand deep inside me while one man fucks her and a second face fucks me.
After a while a two soccer teams arrive for a match but that gets abandoned when they spot me! I lose count of the number of fucks and blow jobs and at one point I must have passed out because I wake up to the amazing feeling of at least a dozen pricks soaking me in warm piss.
During a lull (!) a curious stray German Shepherd makes use of me. A few more dog walkers stop to watch before encouraging their pets to do likewise.
In the evening a gang of teenagers take turns fucking me while the girl members make me up and scratch and bite my genitals before one sucks me off on a dare.
Near to midnight and the pubs turn out and I'm faced with a group of drunk men and women. A couple of guys fuck me before a large beer bottle is pushed deep inside me. One woman, a fat granny, makes me lick her cunt before filling my mouth with her piss.
Eventually they move on and I pass out again, waking to find that I'm now untied. Still naked, I make my way home, very sore but even more content...