Sorry if I already wrote about this:
Went to the gym with my girlfriend at the time's dad a couple of times. We would visit them for the holidays and he offered to take me to the Y for a workout. We lifted together, and I tried (and mostly failed) to learn racquetball from him. It was fun and he was a chill dude.
Afterwards we finished up and went to the showers. It was an old school, kind of nasty, gang shower in the basement of the Y. You know the kind, has not been updated since the 1970s. I took a shower head a few away from him and soaped up. We didn't chat or anything, we just did our business and rinsed off. but I definitely took a look, he was hairy as hell, and had a decent sized soft dick coming out of a big patch of hairy pubes. I was being pretty modest, for me, as I didn't want to chub up or even fluff up while we were in the shower. I was young, just out of college, so I was still a pretty horny fucker and could get a boner pretty easily back then. I didn't though, thank God. But I definitely saw him sneak a casual look at what I was packing once or twice.
We were sharing one locker, so we both went back to the same locker, dried off. Not really hiding it as we had just seen each other naked, but also not flaunting it in front of the other either. Got dressed and went back to their house.
He and I did that a couple of times after that first time, when me and my girlfriend would go visit them for holidays.