First Pie (Sometimes referred to as chicken pie): French Kissing.
Second Pie (Sometimes referred to as meat and potato pie) : Stimulation of the genitals. (Fingering, Hand Jobs, etc).
Third Pie (Sometimes referred to as steak and kidney pie) : Oral sex
Fourth Pie (Sometimes referred to as Creme Brulee, Strawberry Souffle, or other types of extravagent desert : Sexual intercourse
If someone is suggesting that a person present has had sexual intercourse, they may shout out "Who ate all the pies?" If a person responds with "I did," "I ate all the pies," or something similar, then they are stating that they have had sexual intercourse.
Other code names are used for other things that are sex related are involved in the pie chart. These include:
Food Poisioning : A code word for STI's
Indigestion : A code word for pregnancy
Packaging : A code word for condoms
Mike: "I am going to eat creme brulee tonight,"
Josh: "Make sure you leave the packaging on and don't rush into it. Otherwise, you could end up with severe indigestion!"
Mike: "Hmm.. maybe it's easier to just eat steak and kidney pie."
Josh: "Nahh.. that pie can taste unusual!"