Forget the ring for now and toss yourself off.

  As you watch the three girls in the communal shower, water running down their lovely smooth and shiny skin, you can't help it, you stand up and get as close to them as you can, unzip your pants and begin beating your now rock hard cock vigorously.

  You are fairly adept at masterbating silently as you've been doing it for years in your bedroom as your parents were in the next room.

  You stand just out of the fall of the water and greedily take in the girls luscious, pert breasts, their long slender legs leading to curvacious firm asses and their little pussy lips, just visible between their thighs.

  That does it and your cock explodes sending long thick creamy streams of cum across the room and it hits the nearest girl and runs down her legs with the water. Because of the shower, she doesn't feel it.

  It does look funny though, because even though you are invisible, your sperm isn't and you see it seemingly appear from thin air as it shoots out of your dick.

  Satisfied (for now), you leave the girls to it and exit the leisure centre and go home for a well deserved nap.

  After your nap, you awake to see you have reappeared. 

  You begin to think about what else you can do with this ring.