When a male in a committed
relationship (attempting to remain
virgin for strongly moral reasons) engages in the repetitive rubbing and twirling of a erect penis on the buttox of his partner, while cuddling or spooning. This action may result in a non-penatrative ejaculation in which more "painting" could result.
Referred to as "painting da
booty", since the action resembles an artist's use of a paintbrush on a canvas.
Friend 1: Yo Devon, I heard you were "painting da booty" with
Savannah the other night. I respect that, since you remain
virgin and retain you're religious convictions and values.
Devon: Yeah man it was pretty awesome, I felt like I was painting the Mona Lisa, but all I had was white paint.