She was a young girl, just about eighteen. Her blonde hair sat on her shoulders and stopped just above her round, heavy breasts. She had a tiny waist on her petite frame, wide hips, slender arms & legs but most notably: a mesmerising arse. A proper bubble butt, full in all the right places: almost as though it were begging to be spanked and in yoga pants. Well, it's a wonder the other men in the room could miss it. I came in for my first session in early January, the gym was