Too much supermarket shopping dulls the mind

On Saturday my husband and I popped into the supermarket on our way home from the beach. As usual we mainly picked out the items that were 'on special', and made our way to the checkout. The lines were horrendous, and after waiting for a few minutes I left hubby with the trolley and went to find some extra items 'on special'. When I came back to the trolley, my husband had his cellphone to his ear. I approached and meant to say "Are you on the phone?"

What I said - completely by accident - was, "Are you on special?"