Will is my massage therapist. Outside of massage therapy, he's a soccer player, and has that lean, muscular build. He's 5'7", of Greek ancestry, and from what I've seen (legs and top of chest) he's covered in a dark layer of fur. He's always very proper, excuses himself to allow me privacy to change, even if I'm only taking my shirt off. I have some back and shoulder issues, and he works on the upper body a lot, less often on my legs, so quite often I only need to be shirtless.
However, as well as massage, he does a therapy called fascial stretching which involves a lot of stretching, with him using his body to move mine. For example, he'll bend my leg over his shoulder then thrust up and away from my hip to stretch that joint. This position places his groin very close to mine. Another technique is to place my foot in his groin and bend my leg up and toward my shoulder.
Will is, as far as I knew, completely straight. He's been with his girlfriend for many years, and I don't even get a whisper from him, most days anyway, of any same-sex attraction. He knows I'm gay, we've talked about it and my life over the few years that I've been seeing him. He's always been curious and just seemed interested in my life.
This happened some time ago (pre-pandemic). I had a scheduled session with him for fascial stretching. For these sessions, he asks that I wear loose fitting cloths or a pair of gym shorts, something that won't impede movement.
Preceding this session, I'd been more than horny and feeling a bit slutty, and on this day, I decided that while I'd wear shorts, I'd be commando under them. The material, of the shorts I chose, is a very thin, almost a see-through lightweight nylon. He has amazing hands and the fur on his arms feels fantastic as he slides his arms across my back, with just the lightest tickle. With that in mind, it helped with the choice to go commando this day.
As we begin the session, Will asks what issues I'm having (we usually start with discussing problem areas) and I let him know about some hip stiffness (legitimate) and my usual aches and pains. We start the stretching session with me on my back. As he starts moving my legs around, stretching and bending my body, leaning into, on, and over me, my cock is flopping around in those shorts. I notice he's looking, not staring but he's definitely looking. As he places my foot in his groin, I swear I can feel his cock under my toes. I lift my head up and look at where my foot is placed, he continues with the stretch.