Mamy...I had the chance of working on the Sex Survey,
or NATSAL as it should correctly be called. But I decided that I wouldn't be comfortable asking people the kind of questions that would have been involved.
http://www.natsal.ac.uk/about/background.aspx
But many of my colleagues, mostly women. didn't find it too difficult.
The good aspect of my job, is that I can pick and choose what surveys and studies I take part in, as the work is entirely freelance.