Lol, exotic, or fewer men putting it about more. 
I'd put the blokes I know in a high user demographic, and I'd struggle with 1in 7, I think. Could be wrong.
Was at a conference with a researcher from Aberdeen - I'm pretty sure she was using different stats, but I don't know if I've still got the refs... But I'll dig out the Home Office stuff and have a look. Their methodology should be pretty watertight, but a lot depends on what they are trying to prove...
I'm not shocked, I don't think. I just think it's probably high.