Has anyone ever seen or been the person of interest in either of these places?

What were the reactions of those around you who saw? And your own reaction?

I myself am a member of La fitness. And often times I'll become semi to full on hard in the locker room when I'm changing. I've gotten plenty of stares, nods and long glances.

Anyone else have any stories they could share?

One time I discovered a guy peeking into my shower stall. I started to play with myself. He shot his load all over the shower curtain and quickly left. I slowly stroked off. Never saw him again.

Can't say i've seen one at full mast in that setting since high school, when it 'just happened' to probably a different person every other week or two. See plenty of quarter/half mast in the gym but no one makes much of it.

I remember back in high school, in the pool locker room, we were all naked and changing back into our street clothes, I saw one guy get hard and that triggered mine. I was embarrassed and kept to myself. I felt bad for the guy who got hard, because he got teased and I didn't. I guess I kept my interest in guys better hidden back then.

I've become hard in the shower a few times. Usually when I'm by alone in the shower I tend to soap myself up really well and get a little excited. We have open showers so I got to be careful, any one walking in or past can see right away. I have managed to cum a couple of times. Man what a rush.

Its been far too long since I've had the opportunity to bone up in the stall. I've had several mutual jo sessions in the stalls. I've never been hard in the locker room though, just the shower.

I used to go to the gym regularly and seldom saw anyone naked. Never seen or had anything good happen in a gym.

Yeah, I had a near-miss of nearly getting hard when someone else did (with similar unfortunate ridiculing for him) but managed to keep it down long enough to cover up. Oddly the next closest I came to getting hard in that situation was feeling the coarse material of a towel on me. So I actually found the safest way to be was not cover up!

I actually could never be bothered jerking off at the gym until quite recently. Mind you, the cubicles there are very enclosed so no one would see unless they were really trying to peek. Perversely the people you most see naked are generally the ones you don't want to see naked at all

... Speaking of those high school boners ... brings back a memory ... Similar situation as described above. I remember being amused when, in the showers one day, one guy got an erection ... and later on ... almost every single one of the homophobic rednecks came out of the shower boned-up. That one hard-on was contagious! lol The guys were unusually quiet that day.

When I played basketball in high school, the black guys on the team all had huge limp cocks. There was one white guy who challenged them to get hard and compare. He stroked it and got hard and invited all of us to measure him. Of course no one did, and everyone laughed their ass off.

A few years back i was at the YMCA and this young guy came in form a karate class. Anyway, the poor guy had a dick hard as a rod and couldn't get rid of it. Lots of guys gave him the eye while he showered and tried to cover up. Afterwards I left the dressing room to go home and the guy was sitting with a pretty young girl in the lobby with a big tent in his pants. Don't know who was luckier the girl or him!!!

I don't go to a gym but I have jacked off in the locker room shower of our community pool. I got in the shower and soaped up my cock and shot a nice load. I took my j/o buddy down there one day to show him our pool and locker room, I unzipped his pants and put his cock in my mouth and sucked it for a bit. He got nice and hard but he didn't cum...that was fun.

Cool story

Also a member of LA Fitness here in Florida. Often jack with other guys in showers, and sometimes in sauna, but gotta be careful. Nice to see some guys shoot a big load.

When I was going to school at Norfolk Naval Base, periodically I would have to stand a dog watch (a 2-hour watch before or after midnight) in the barracks. After I finished my watch, I would ask the chief if I could shower before I turned in. The showers were always lights out at 2200 hours, so they were dark. I would go to the showers with a towel around my waist and clods on my feet. Since there were no light on in the shower, I would ALWAYS get a boner when I soaped up my cock and I would always jackoff and shoot a gigantic load of stored up cum. This got me thru 16 weeks of school without getting blue balls. I never complained about having to stand a dog watch!