During anal sex, right before you spill your man juice. You quickly pull out, with some poop still on your cock and slam it in her vagina and get off.
"I tried the Ol' Late Night Brownie Baker on my girlfriend last night."

"Oh yea, how'd that go?"

"She's still pretty mad. Says the kid is gonna smell like Pig Pen all its life."
by Raspberry Babingka October 21, 2011
Get the Late Night Brownie Baker mug.