This happened to me last night! I went with my cousin to this new gym. We went out to a family restaurant before this trip to the gym and she offered me the chance to go and work out.
It was late, around 10:00pm, I was the only male left in the gym. So around 10:30pm we were 'forced' to leave because obviously the gym was closing. Anyway, the locker rooms are seperate but the little hallway to the showers are joined together between the rooms. At that time I was going to take a nice shower and noticed all the ladies completely naked walking towards the same showers I was going to use.
I quickly got an erection and tried to hide it with my towel. So I got to the showers and I was really embarrassed. I was thinking of just going back without showering when my cousin shouted out and made everyone look at me, 'Scared to show your jewels hunny?' I was soo embarrassed. She came over towards me and forced me into a corner. She moved the towel away and said, 'Oh, that's bad. We need to do somthing about it!', with a smile on her face.
She was naked, she had beautiful breasts and a shaved pubic area. She's only four years older than me. I was speechless. I couldn't say a word! She uttered 'SHhhhhhh...' She stroked my penis ever so gently. I had the most wonderful orgasm of my life and my cum went all over her body. She turned on the showers, washed it all off, and acted like it never happened. I quickly washed up and left. On the ride home she told me not to be ashamed of what happened. We all need to relieve ourselves sometimes and that it's fun when we do it with other people!