During intercourse between a male and a female, the man crouches down on the womens' chest, and takes a shit on her chest. The shit is then used for lube, which the women jacks off the male with it. Then the semen is mixed with the shit, and they feed it to eachother with their feet.
Tyler:Hey Brandon want a Mississippi Mud Pie?
Brandon: No thanks, Kaleigh already gave me one.