A girl walks into a supermarket up north and buys the following:

1 bar of soap
1 toothbrush
1 tube of toothpaste
1 loaf of bread
1 pint of milk
1 apple
1 banana
1 orange
1 plum
1 peach
1  grapefruit
1 tomato
1 lettuce
1 cabbage
1 baking potato
1 samosa
1 vegetable pakora
1 muesli bar
1 pie
1 single serving of cereal
1 single frozen dinner
1 single frozen pizza

The checkout guy  looks at her, smiles, and says,

Single, huh?"

The girl smiles sheepishly and replies,

'How'd you guess?'

He says, 'Because you're ugly.