When having sex with a woman who is lactating, collect a glass of her breast milk. Place your woman on her back with her legs in the air and pour the breastmilk into her vaginal canal. Procede to FUCK her straight down as though you are churning butter. When the milk curdles, wipe it on a piece of toast and feed it to your partner.
"Dude, last night my chick was hungry, so I gave her an Amish Butter-Churner!"