This is a true experience that happened to me a few years ago.
I had just turned 50, and had been happily married for over 20 years. (Okay, there had been a few escort girls along the way, but mine was a stable marriage.) I suppose the word average pretty much sums me up: white, average height, average build, average looks, with a circumcised cock around 6 inches when erect.
In the city where I worked there was a gay sauna. It was just off one of the main roads into the city, discreetly located down a private driveway behind a row of shops, looking for all the world like a small factory. Every morning I would pass it on my way to and from work, and once I became aware of it I started to become fascinated by the idea of it. In all honesty I couldn't have told you why: I wasn't sexually attracted by men, and I was sure I wasn't gay; but it just felt like that was an area of life experience that had been closed off to me, and I started to wonder what it would feel like to hold another man's cock, or to suck one, or to feel one inside me.
Anyway, one day my wife had to go away on an overnight business trip and I visited the club. It wasn't really a conscious decision on my part, just that evening after work I turned down the driveway instead of passing it. On entering the front door I found myself in a tiny room, not much larger than a phone booth, with a service window in front of me. A guy appeared there and I paid a modest entry fee; he gave me a towel and pointed me through a door opposite.
There I found an open plan changing area, devoid of other people, and lockers. Operating more or less on auto-pilot, I stripped, put the rubber band attached to the locker key around my wrist, showered and, towel around my waist, passed through a full length beaded curtain hanging from an open doorway.
I'm not sure what I expected inside: naked nubile young men slouching against the walls, eyeing up the clientele and suggestively playing with themselves? Of course it was nothing like that. To one side there was a small bar, serving complimentary orange juice, where a couple of naked men were sitting, to the other side an empty jacuzzi. Most of the guys in there were middle aged or older and looked like the sort of people you might see behind the counter in a bank, or working as solicitors; married men playing away, like me.
Beyond the bar were a couple of sauna cabinets, and I entered one. There were already two blokes in there, one around 60, the other in his 30s. They completely ignored me as they gazed into each other's eyes and wanked each other. I stayed a few minutes, enjoying the heat and developing a light sheen of sweat, then decided to explore further. There wasn't much else on the ground floor, so I went upstairs. The rooms there consisted of a massage room, complete with fully dressed male masseur; a video lounge with black leather furniture; and perhaps ten cubicles, each with a wooden platform supporting a thin mattress covered by a sheet, a TV showing a feed from the video, a box of tissues and small wicker baskets containing condoms and small sachets of lubricant. Three or four of the doors were bolted closed.
I went into the video lounge, where there were four or five men arranged on the sofas and chairs, each n their own, some with their towels around them, some naked. Only one looked out of the ordinary: a huge black guy with really dark mahogany skin. There isn't a big African American community in the city so his presence was a bit of a surprise. I reckoned he must have been six feet four tall, with a big barrel chest, stippled with tufts of hair -- my first thought on seeing his physique was 'Cuban discus thrower'! He had close cropped hair, a handsome face with a little pencil moustache and a seven o'clock shadow.