After a bad break-up and getting laid off, I threw myself into getting into shape. I joined a fitness boot camp gym. It had a great community, and since it was in the middle of our city's downtown, it wasn't uncommon for members to go out after an evening class. It even got to the point that we would all get changed & showered and go out, and then we started planning social events at the gym.

One Saturday afternoon we were grilling in the parking lot and having a dance party in the gym area. I had brought my girlfriend to hang out with the group for the first time.

Beers were flowing and we were all having a good time, and my girlfriend asked for a tour. I was showing her around, but it was largely just a big gym space when she pointed to a doorway and asked "What's in there?"

"Oh, that's just the showers and changing area."

She took my hand and pulled me in there. She looked at me, sat on the bench in the middle of the room, pulled me towards her, and started undoing my pants.

A BJ led to me fucking her against the lockers, and then she finally sucked me off to end it all.

Start to end, maybe 5 minutes.

Until the day I quit that gym, I would always start getting hard while changing thanks to that memory.