Almost 50 years ago, when I was in a LGBT rights organisation, an older man in the group found me attractive and when friends were organising a 60th birthday party for him, they asked me to strip for him, as a surprise.
I was far from buff and no more than averagely endowed and thought it odd that anyone would want me to do that. However, I was amused and agreed to do it.
I was mildly stoned at the party but more than a little nervous and embarrassed. I stripped and danced ( a reasonable dancer) from them and got an erection. I was urged to wank but refused. Nevertheless, the man gave me 50 pounds - more than twice what I earned in a week. He offered more if I slept with him but again I declined.
I never repeated the stripping. I had found it amusing, embarrassing, a bit of a turn-on and after that I was uncomfortable with the guys that had seen me strip.
A couple of years later, I was much more comfortable about being naked in public, whether others in the company were naked or not. I would then have agreed to strip again but i never offered and no one asked me.