To the woodshed

In a recent radio interview a US politician suggested that George Bush should "take him [one of his advisers] to the woodshed".

What would they be doing there? In the UK woodsheds are just sheds to keep wood in.

Gary

A spanking. The vision (rural, and kind of 19th C.) is a father taking his misbehaving son out to the woodshed to administer a beating.