Why do they steal fruit and not candy or cheese?

Having a lively discussion on a FB page about people snacking on fruits they swipe from the produce department as they grocery shop. Some people see no problem whatsoever with stealing the fruit to give to their kids to eat to keep them busy while they shop, or stealing fruits themselves. I have a problem with it.
But then I wondered…why is it always fruit? Why don’t they steal pop and chips? If they kept the wrapper they could at least pay for them. Fruits, on the other hand, are mostly sold by weight.
So why the fruit and not other things? Why not candy?