A blond cowgirl, who is visiting Tennessee from Texas, walks into a
bar and orders three mugs of Bud. She sits in the back of the room,
drinking a sip out of each one in turn. When she finishes them, she comes
back to the bar and orders three more.

The bartender approaches and tells the cowgirl, "You know, a mug goes
flat after I draw it. It would taste better if you bought one at a
time."

The cowgirl replies, "Well, you see, I have two sisters. One is in
Australia, the other is in Dublin. When we all left our home in
Texas, we promised that we'd drink this way to remember the days when we
drank together. So I'm drinking one beer for each of my sisters and one
for myself.
The bartender admits that this is a nice custom and leaves it there.
The cowgirl becomes a regular in the bar and always drinks the same way.
She orders three mugs and drinks them in turn. One day, she comes
in and only orders two mugs. All the regulars take notice and fall
silent. When she comes back to the bar for the second round, the
bartender says, "I don't want to intrude on your grief, but wanted to
offer my condolences on your loss."

The cowgirl looks quite puzzled for a moment, then a light dawns in
her eyes and she laughs. "Oh, no, everybody's just fine," she explains,
"it's just that my husband and I joined the Baptist Church and I had
to quit drinking. Hasn't affected my sisters though."