The bartender says "Well, since it's your birthday, I'll buy you a drink...... in fact, this one is on me."
As the woman finishes her drink, the woman to her right says, "I would like to buy you a drink too."
The old woman says, "Thank you. Bartender, I want a scotch with two drops of water." "Coming up," says the bartender. As she finishes her drink, the man to her left says, "I would like to buy you one too."
The old woman says, "Thank you. Bartender, I would like another scotch with two drops of water." "Comin' right up," the bartender says. As he gives her the drink he says, "Ma'am, I'm dying of curiosity. Why the Scotch with only two drops of water?"
The old woman replies, "Sonny, when you're my age, you learn how to hold your liquor. Water, however, is a whole other issue."