Free Groundnut ?

An old man and a young man work together in an office.
The old man always has a bottle of groundnuts (peanuts) on his desk, and the young man really loves groundnuts.

One day, while the old man is away from his desk, the young man yields to temptation and quickly eats over half of the contents of the bottle.
When the old man returns, the young man feels guilty and confesses to his crime.

And the nice old man answered . . .
"Don't worry, son. I never eat the groundnuts anyway," the old man replies. "Since I lost my teeth, all I can do is lick off the chocolate off the M&M's."

_{(i.e. the toothless old man licks off the chocolate covering of the M&M peanuts and keeps the groundnut in the Bottle!)}