I've got another one that won't embarrass me:
My best friend and I used to work together, and our (male) boss took a rather fatherly -- i.e. nosy -- interest in our personal lives. My friend was carrying on a flirtation with a boy who was in the office to work out our computers. The friend, the boss and I were at a business/social event and my friend went into her purse for her cigarettes. Out fluttered a piece of paper, which landed on the ground. The boss deduced it must be the computer boy's phone number, and dove for it. My friend tried to keep him away, but she lost the quite physical struggle. Turned out the "paper" was a tampon wrapper.