This happened the other day and I haven't been able to stop thinking about it. Sometime ago I participated in a group nude skinny dip for charity which was a lot of fun. I love swimming nude and the opportunity to do it with a bunch of people was something I've always wanted to do. The vibe was amazing.

Afterwards I got a friend to take a picture of me from behind, nude, with my arms up in the air in celebration. My wife hadn't joined me - too shy to do something like - so I send it to her to show her that I was done.

Then, in a cheeky moment, I posted it to my stories. You know, its something people do. Ladies do this all the time. I've always had a little bit of an exhibitionist streak but I've never really done anything this bold and public before. I'm not much from the front, especially after a cold swim(grower not a shower), but I have it on good authority from my wife and other partners that I have a particularly nice bum. I have to admit that I got a bit excited seeing who had seen (and liked) the photo out of all my friends and acquaintances throughout the day but I knew that the nature of stories is ephemeral and it would disappear soon.

Then the other day I was working, airdropping things to my laptop when the photo popped up briefly. I had a look at it, chuckled and then went back to work. But then I couldm't stop thinking about it. How naughty it had been to post. How many of my female friends had seen it. How many of my long time, very attractive friends had seen it. My wife's very cute friend had seen it, my Sister in law had seen it. They all knew what my ass looked like now. What did they think? I pulled the photo out and took a long look at it. I do have a very cute bum.

I couldn't concentrate on work and suddenly got very, very horny. I took myself off the the toilet, locked myself in the cubicle, brought up the photo again and started vigorously jacking off. Thinking of all my female friends looking at my ass, knowing what it looks like, maybe taking a screenshot of the photo to look at later, talking about it with each out, complimenting me,reaching out grabbing it. Me on display and all of the.loving it. I came in a frenzy.

I was a little shocked as this was something completely new to me. I think I may have unlocked something but I'm not sure what...