Ride on the rowing machine

Let me keep it warm and hard for you.

As he sits down to use the rowing machine, you also sit in his lap and impale yourself on his iron hard cock. As he starts using the equipment, you thrust yourself onto his cock with each rowing action he does, making you able to feel each one of his heartbeat that causes his cock to twitch inside you. You know he's close to cumming. You also hear the fraternity guys working out around you.