An Irishman walks into a bar
 An Irishman walks into a bar in Dublin, orders three pints of Guinness and
 sits in the back of the room, drinking a sip out of each one in turn. When he
 finishes them, he comes back to the bar and orders three more. The bartender
 asks him, "You know, a pint goes flat after I draw  it; it would taste better
 if  you bought one at a time." The Irishman replies, "Well, you see, I have
 two brothers. One is in America, the other in Australia, and I'm here in
 Dublin. When we all left home, we  promised that we'd drink this way to
 remember the days when we drank together." The bartender admits that this is
 a nice custom, and leaves  it there.
 The Irishman becomes a regular in the bar, and always drinks the same  way:
 He orders three pints and drinks them in turn. One day, he comes in an
 orders two pints. All the other regulars notice and fall silent. When he
 comes back to the bar for the second round, the bartender says, "I don't
 want to intrude on your grief, but I wanted to offer my condolences on your
 great loss."
  The Irishman looks confused for a moment, then a light dawns in his eye and
 he laughs.
  "Oh, no," he says, "everyone's fine. I've just quit drinking."