From this point forward, you are to wear only jockstraps.  Preferably with a loose pair of basketball shorts over them.  The guys and I want easy access to your tight ass.  Whenever we need to blow a load, we will grab you and bend you over. 

The jock has several benefits in addition to ease of access, the straps frame your ass, the waistband give a good grip for rough fucking and the pouch keeps your junk out of the way. 

To be nice and get you started, here is my old, crusty jock.  put it on and I will pound you here and now.