That's his bowl

A man was on a walking holiday in Ireland.
He became thirsty so decided to ask at a home for something to drink.
The lady of the house invited him in and served him a bowl of soup by the fire.
There was a wee pig running around the kitchen, running up to the visitor and giving him a great deal of attention.
The visitor commented that he had never seen a pig this friendly.
The housewife replied: "Ah, he's not that friendly. That's his bowl you're using."