A Man or Woman will lay upside down on a wall, the Woman will urinate filling her Vagina with Urine until it flows over the Vaginal Lips and into her mouth, or someone elses mouth.
For a Man to perform a Urine Hayeswall he must lay upside down against a wall with his feet in the air. Aiming his Penis up he will Urinate, pooling the Urine in his Gooch until it flows over the side and into his mouth.
He said, "Hey Baby, wanna flip upside down so we can Urine Hayeswall?"
He then flipped me over into Hayeswall position and I began to Piss!
What an erotic night!