This is the infamous sex position introduced to the world by Luke Holland. It is when a man throws his partner (man or woman) on to a near by surface, allowing him to gain a dominant stance over them. He then proceeds to take his testicles out and slips them into the partner's anus, one at a time. At this point the anus almost becomes a vacuum, sucking the balls deep inside. Keep in mind only the testicles enter the rectum. It is very satisfying to both participants.
by Wolverine at the rock September 11, 2014