"It Is Obvious My Dear" joke

A woman walks into a department store and buys:
1 bar of soap
1 toothbrush
1 tube toothpaste
1 loaf of bread
1 pint of milk
1 single serving cereal
1 single serving frozen dinner
1 single-size bedsheet
The handsome clerk at the checkout counter looks at her and says, "Single, are
you?"
The woman replies very sarcastically, "How did you guess?"
He replies, "Because you're freakin' ugly."