This happened back when I (20m) was in college and hanging out with an art major (21F) named Jessie or J. She was involved in a figure study group where artists and students could work on their craft whether drawing or painting.
Jess herself was really really sexy: about 5’2″, with perky apple sized breasts, a small waist, and a really large, plump butt. She would model at figure study sometimes and I was always amazed how good she looked. We were mainly friends, the kind who talked about everything, but we’d slept together couple times and found each other attractive.
Jess actually convinced me to model once. I felt self conscious and nervous, for sure, but I was in good shape at the time and I ended up feeling good about my body and how it went. I would also join the group sometimes to draw, just for fun. Usually I didn’t ask in advance who the model would be and I’d be just surprised by different body types, guys or girls, etc. One time I happened to ask though and J said the model was kind of different. She didn’t elaborate much and I didn’t follow up.