How often do men really think about sex?

We've all been told that men think about you-know-what far too often – every seven seconds, by some accounts. Most of us have entertained this idea for long enough to be sceptical. However, rather than merely wonder about whether this is true, stop for a moment to consider how you could – or could not – prove it.

If we believe the stats, thinking about sex every seven seconds adds up to 514 times an hour. Or approximately 7,200 times during each waking day. Is that a lot? It sounds like a big number to me, I’d imagine it’s bigger than the number of thoughts I have about anything in a day. So, here’s an interesting question: how is it possible to count the number of mine, or anyone else’s thoughts (sexual or otherwise) over the course of a day?