When you have a side girl or girl that is under 5'3 and weighs 100lb or less and their easily carriable wherever you go. Their very convenient for a quickie.
John: I used Sarah my Human pocket pussy after a long day of work to let off some sexual frustration of looking at all these 8+ girls.
David: Damn, maybe i need one of those to.
When Military men arrive to a new base/station and find a civie girl to sleep with for the duration of their stay/orders to fufill sexual urges/desires, when they recieve orders elsewhere, they drop their B.P.P for a new one at their next base.
A vagina used as a storage place for money, drugs, small children, weapons, snacks. Usually has a thick coating of thotsauce most females who use it have characteristics of a Cassie-Boo
Nasty hoe put $300 in her pussy-pocket when she went to sleep so her crackhead momma wouldn't find it. When she woke up it was gone!