scrotum combing
Your guy is laying bottom up. You pin four or five fingers at the root of his scrotum and scratch delicatly, lovingly, in the direction of the balls, then back up, then back down... You proceed softly, but you manage for his balls to feel clearly your fingers scratching them from the back, of even from the front.
He was displaying his ass and balls to me. Bottom up on the bed. First, I licked his balls softly, from behind. When they were all wet, I sticked my lips and tongue in his adored slit-ass. I then did some scrotum combing on his wet trembling balls. I was licking and combing softly, getting hard myself, dreaming already to fuck his adored cock hungry ass.
Scrotum Comb
The act of using ones gangly, caveman-like hands to scratch ones dirty ballsack, then attempting to go about your daily business without washing your hands.
Hey dude, I wouldn't get ice out of that machine, Mike just used his scrotum comb to fill his cup up.