A woman is shopping in the local supermarket.  She selects some milk,  some
eggs, a carton of juice, and a package of bacon.   As she unloads her items
at the cash register to pay, a man standing behind her in line watches her
place the four items on the belt and  states with assurance,  "You must be
single."
The woman looks at the four items on the belt, and seeing nothing  unusual
about her selection says,  "That's right. How on earth did you know."
He replies, "Because you're ugly."