Potato is injurious to health

Over the lunch table
He: Eeks! You are eating potatoes again ?
I: Head bent and busy eating
He: Potatoes are bad.
I: Grin
He: They contain fat.You will put on more weight.
I: ..
He: Potatoes will kill you. They are so bad.
I: Hmm
He: Potatoes are injurious to health. Don't know why people eat potatoes.
I: ..
He: You should follow me. Have you ever seen me eat potatoes ?

I slowly raise my head, look into his eyes "And smoking?".
He blushes, grins, turns red in face, turns his face away.

We silently finish lunch.