Kate: 'What is my thought like?'
Chas: Fruit cake
Kate: My thought was 'Tony'.
Kate: Why is Tony like a light?
Anna: Because he often goes out.
Kate: Why is Tony like a fruit cake?
Chas: Because he's nutty.
Kate: Why is Tony like a kitten?
Tony: Because he's so lovable!
Source: The Oxford A to Z of Word Games