Not sure how to even explain it. He basically massages your shoulders and upper back at the same time he runs the other hand up and down your inner thigh. He states that you will get aroused and that it’s natural but it’s important for you to not ejaculate and to channel that energy. As he's doing this, he’s frequently “bumping into you”.
I’ve had a few other MMA guys give massages before and they always seem to be the ones who claim their “straight”, but seem to get off in a sense rubbing other guys and seeing other guys naked. There seems to be some sort of trend between MMA and some hetero-flexibility.