I answered and a man asked to speak to "Mr or Mrs White please". I knew by the tone of his voice he didn't know me, so I asked him if he thought I was married or something (I am SO not). He stuttered and I said "because I actually find that really offensive". To help him out I asked him what he wanted. He wanted to offer me a free quotation on an alternative electricity supply, by which time I said "what, you think I'm really going to be interested in that now?", he stuttered some more and said again that it was just the information he had on his system, that it was just his system. "Well maybe you should question your system" I said, and hung up.