I'm a gas engineer by trade and spent this particular Friday afternoon servicing the boilers at my local leisure centre.
The door to the small boiler room I was working in was almost opposite the men's changing room door, I saw a couple of middle aged guys go in to get changed.
Both men reappeared in squash kit and headed for the courts, the second guy gave me a bit of a lingering smile as he passed but I thought nothing of it.
I could hear the squeaking and grunting of the squash match as I worked and shortly heard one of the guys say his goodbyes and leave to change, the other guy must have been practicing alone.
Five minutes later the other guy passed me on his way to the changing room.
Now I'm a straight married guy but I have always been a bit curious and watched a fair share of bi porn but when this guy walked past, with his shirt off dripping in sweat, I found my cock had become immediately rock hard.
Something he hadn't failed to notice as I saw him glance at my crotch and give me a knowing smile as he headed into the changing room.
I was a bit embarrassed by my reaction and carried on with my work but the thought of him stripping off to shower 10 yards from me set my cock throbbing.
I decided to poke my head out of the door and take a look around.
He had obviously suspected I would, as he had positioned himself so I had a direct view of him naked from the door of the boiler room.
He had his back to me and was toweling himself down, he then lifted the towel to dry his hair and I got a view of his naked ass.