one guy says that at his pub, he buys 4 pints, gets one free.
the next guy says that at his pub, he buys 2 pints, gets one free.
the third guy says that at his pub you come in the give you a pint, free.
then they give you another pint free, and a third one free.
and then you get to go upstairs for wild sex, free.
the first two guys think a bit and the first asks "is this real?".
and the second guy asks "do -you- get that?".
and the third guy says "well, no, not me but my sister does, all the time!"
then the fourth guy down at the end says "I think I know your sister.".
That almost sounds like something Kevin Wilson would do a song about.