The consensual act wherein genitalia comes into direct contact with another's genitalia and\or orifice. The giver of said tail must be a member of the female gender, whereas the receiver of said tail can be either male or female. More commonly known as a booty call.
Kwesi: "So, up to any hi-jinx over the weekend?"
Joe: "Of course, I got some action."
Mike: "Yeah, I had a little social tail as well."
Kwesi: "You can't get social tail, you're a faggit"