Research - 9 out of 10 UK women don't accept one night stands

BBC NEWS: "Women say 'casual sex is immoral'"

This research is based on in-depth interviews with 46 women. The article makes claims like

They found that although participants thought one-night stands were immoral, they did not condemn women for having them as many of them had indulged themselves.

I wonder about how those interviews have been done, and whether they have been "content neutral" or those interviewed has been led on. It seems the results surprised the researchers - and it surprise me a little bit, yet thinking carefully about it, it seems reasonably logical. Women tend to verbalize and rationalize, and there's a strong internal justice against "being too easy". If the interviews were heavy handed and forced the women to decide, this would probably land on the women transferring this to being negative, and then rationalizing this as thinking it's not morally acceptable.