Take what off?

Toren and Debi were laying on the couch together one evening when I overheard the following conversation:

Toren, reaching his hand toward Debi: “Mom, take this off.”

Debi: “Take what off?”

Toren, wiggling his fingers: “My boogers.”

Toren had, in fact, picked his nose and was asking Debi to get the boogers off his fingers.