"Never trust a man, who when left alone with a tea cosey... Doesn't try it on"

This quote by comedian Billy Connolly is a funny take on the idea of trust and human habits. The use of the tea cosey, a decorative cover for a teapot, contributes to the lightheartedness of the statement. The underlying message is that a person's true character can be exposed when they are left alone with something apparently unimportant. In this case, the guy's actions of not trying out the tea cosey recommend a lack of curiosity and playfulness, which might be viewed as a warning for reliability. In general, the quote works as a tip to not judge someone exclusively based upon their words or actions in front of others, however to likewise observe how they behave when nobody is enjoying.