From the Mouth of a Child

Rachel was trying to use her mouth to open the lid of a yogurt cup. Here's our exchange:

Me: "Honey, please don't do that. Remember, you don't know who's been touching that."
Her: "Maybe it was somebody who'd been touching his bum, for a while."
Me: "You never know. Could be."

I certainly hope not, but you really don't know who's been handling the groceries before you. Could be a bum-toucher.