Someone better tell Lucy!

In the news today:
In advance of a talk on pet behaviour at Edinburgh International Science Festival, Dr Mackay said: ‘It is very common for a dog to lie down, show its tummy and lift its legs in the air, but that is not a request for a tummy rub.
‘When a dog does it to another dog it means “I trust you and I think you are a good dog to be around”.
‘So when a dog does it to a human they trust, it can then be alarming if that human invades their space and touches their soft, exposed belly. They have simply learned to put up with it.’