(variation of the roman war helmet) This maneuver is performed by placing your testicles over the eyes of your partner, forming a mask. Then the breathing apparatus is formed by placing the end of your penis into the receiver's mouth. This maneuver if preferably performed in water(bath tub, hot tub, pool etc.)
My girlfriend wanted to go snorkeling in the islands but I couldn't afford it. So instead, I tricked her into snorkeling my penis.