I recently went to a new gym. A large, well-known chain, with devices of all kinds, and a very varied clientele. I got into the habit of going there for a good hour in the early evening. I'm wearing a tank top on top and jogging pants that are quite tight at the ass, with nothing underneath. When I do certain exercises, I see in the large mirrors in the room that my ass is clearly visible and well highlighted by my light jogging pants. I also see in the mirrors that some guys look good on my ass when I'm on certain devices, or on bikes. I have a nice big ass, with nice round buttocks, and on the bike they roll well. Some guys at these times often position themselves on the cameras behind me, and don't miss a bit of the show. I spotted several. Among this is a tall black guy in his forties, tall and thick, with a big belly, and arms like my thighs. He rubs himself between his legs with his big hands when no one is around, I can see him doing it very well in the mirror. So I accentuate the swaying of my hips, I arch my back well in the saddle. Then afterwards I go on machines where, with my ass well presented on benches, I expose myself well. He follows me every time like nothing. This is starting to really turn me on... When he's there I heat him up more and more. The last time I ran my tongue over my lips as I passed him. Today after squirming on all the devices I could, him following me to the track, I head towards the shower discreetly observing that he follows me well. I take the shared showers, I wait until no one is there, I get naked and I go in, with my ass facing the entrance. I relax under the warm jets of water, soaping myself when, turning a little, I see him entering the showers. So I soap my buttocks as much as possible, kneading them well. He gets in the shower next door. I watch him out of the corner of m ...

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