There are two that come to mind. Both were guys I worked with, both married, both passive crushes, nothing I would act on.
Andy - He was a little younger than me (late 20s vs. early 30s) but we worked closely together. He was a midwest college jock type. Into sports anything. We went to a few Dodgers games but never ended up pissing at the same time. He didn't go to my gym. We played on the softball team together, which was fun getting sweaty and I got to slap his ass (and vice versa) every so often.
A quick description: He was a little taller than me at 6'4". Built. Blonde hair, but cut short. Swimmers build with broad shoulders and skinny waist. He was the alpha of whatever group he was in, confident but not too bro'd out. Killer smile. It was just your typical straight boy crush. He was married so knew that was all it was.
One year we were traveling together overseas. No shared room, but the hotel gym was shit and I told him we should get a week membership at the actual gym nearby so we could have a better workout. He agreed, and we made plans to go the next day after the office and before dinner. I liked my chances.
It worked out better than I imagined. I never know how anyone is gonna act in a locker room. I grew up with sports so it's never been a big deal to me. I don't want anyone to be uncomfortable, but I also think people are needlessly uptight sometimes. If nothing else, I decided I would just be myself. We walked in and went to the same section. I took a locker a few doors down from him as we just kept talking as we undressed and pulled on our gym clothes. We worked out, and once we finished returned to the locker room. We started to undress, and he just ripped off all of his clothes before asking out loud "do you know where the towels are?"
I caught a glance of him full bodied facing me and tried to take in as much as I could without him noticing. His greek god physique, hard chest, six pack, tight butt, was capped off by a nice dick, bigger side of average, under a well-trimmed bush, and over a decent set of low-hangers. Naked, he just walked around looking for the towels and came back with two as I pulled off the rest of my clothes.
"They have a sauna, we should go."
We sat naked in the sauna for a bit, sweating it out. I kept stealing glances at his dick but then had to concentrate so as to not get hard myself. After, we went to the shower room and I almost chubbed up when I saw that it was open.
"Just like high school," I said, and he laughed and agreed, said he hadn't been in a shower like that since he played football. The heat of the sauna must've warmed him because when I looked over his dick looked to be hanging over six inches. It was still floppy, but definitely fuller than when I first saw it.
That was it, we showered and dressed like normal and returned to the gym every day that week. Definite material for the spank bank. The following year when we went back not only did we go back to that gym, but we got another buddy of ours from work to join us.
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Other friend was another co-worker. His name was Tony, and he was kind of an obnoxious but fun guy. He was Italian, gorgeous face, nicely built, more wrestler body, and shorter than me, under 6'. He had gotten married young, religious and conservative, but was an okay guy to have a few beers with. One night we got really wasted the discussion got more sexual than usual. He talked about his wife and the positions she liked, and their regular days for sex and everything. Very non-chalantly he throws out that his wife is sometimes hurt by his cock. "It's not that big, like seven and half." He kept yammering, and didn't even really seem to mean to bring it up, but ever since then I'd been dying to see it for myself.
The moment never happened. We had pissed next to each other a couple times, but I couldn't really make anything out from the corner of my eye. And despite where my interests lie, I really don't want to freak anyone out.
It did happen, but completely unexpectedly, and completely of his own doing.
He had quit where we worked together, but we would still see each other a couple times a year. We would meet at a bar and he would usually come back to my house for one or two more. One night, we both got really drunk and he called his wife to tell her that he was gonna crash in my spare bedroom so he wouldn't have to drive home. She was cool with it, and he commented that she had been so much more forgiving since he got a vasectomy. I was surprised that he had gotten one at 35 years old, but he already had a few kids so I suppose it made sense. He told me that about the surgery and said he had a scar on his nutsack, "let me show you," and then just undid his pants, pulled down his underwear and went to show me his scar. His dick wasn't that long, but it was thick with a big head, and he grabbed the head like a gearshift and pulled his dick up so I could see the scar on his balls. I almost came in my pants right there.
He then pulled his pants up and just continued the conversation as if nothing happened.