So it's official - "Not tonight, dear" is uttered these days more by men than women.

What always amuses me about these "Surveys" is not the results but who they interview. I won't go into the finer points of the Sex Drive study, but if you little further into "Men's sex-drive - there goes his" in today's DT and you discover the only people they quizzed on the issue were couples in therapy! So of course they got the skewed result they wanted!

Send someone out on the streets to quiz Joe Public and you'll get totally different results.

People with a clipboard stopping you on the street or phoning you at home with "just a few quick questions" are a pain even at the best of times. But this is one is so typical of how unreliable "surveys" are anyway. The more "private" the question, the less likely you'll get an honest response. Particularly if you're interviewing some stressed dad minding a rabble of kids out on the pavement whilst missus is inside Tescos buying groceries. If you were that chap quizzed by some stranger about your sex drive would you seriously give an honest answer or lie through your teeth?