In the early stages of a relationship with a former girlfriend, we were chatting away and got onto the subject of her bra size, which I correctly guessed. 'ooh you think you know it all dont you?' she said, to which I replied 'Of course, like I also know youve got a big mole on your (........)'. I have no idea at all why I said it, its not a comment i would usually consider making under any circumstances, but it just popped into my head.