when you do a cumfart whilst out on a walk and your black labrador licks it up
"Hey Charlie, what did you get up to today?"
"To be honest, it's a bit embarassing... I came home from a night out and went for a walk with my black labrador. I was wearing shorts and I did a cumfart, it dripped down my leg and my dog licked it up."
"Oh, so you did a turquoise monkey then?"