A few years ago when I first got curious about sex with men, I found a website which detailed gay cruising areas.... Was staying in a hotel at the time for a few nights, on a course for work...
Decided to bite the bullet and walked 20 minutes to the cruising ground. It was late at night but the place was completely dead.
Just as I was leaving, I saw a used condom in the bushes... It was full with a knot tied in the top. I don't know what came over me, but I bent down, picked it up and put it in my pocket.
Walked back to the hotel with my heart pounding.... It felt filthy that I'd picked up this used jonny from a gay cruising ground. Wasn't sure what I would do with it at that point.
Got back to the hotel and felt more turned on than I ever have. Took out the condom and cut the top of it off.
Heart pounding through my chest and head spinning about how dirty it was to have picked up a used full jonny. Laid back on the bed, one hand wanking my cock and one hand holding the open used jonny.
Laid there for a minute, not sure what to do... Wanted to taste and feel the cum, but at the same time it felt so wrong and so nasty.
As I wanked myself closer and closer... the horniness took over... I tipped the jonny upside down and emptied the load onto my chest... It was full, and it ran in different directions across my chest...
Right on the edge of shooting my own load, I pushed my fingers into the anonymous load, got them covered, then stuffed them into my own mouth.
It tasted strong.... and feeling so slutty, I shot my load all over myself... my streams of cum shooting up my chest and mixing with the strangers.
A true story and by far the filthiest thing I've ever done. This was a good 10 years ago and I've still never cum so hard.