Clicking on the screen shot will enlarge the picture. The Economist information is available here
. Prices tell us what types of characteristics in women that men like most. The second slide probably tells us what women don't like to do and the prices make a lot of sense. Oral sex without a condom is much more dangerous and less desirable than with a condom (similar for splitting out semen or swallowing it). Having sex with multiple men is more work. What seems most interesting here is that women charge less for "heavy" S&M than for just spanking. Is this saying that female prostitutes prefer “heavy” S&M, which I would think involves much more work, over just spanking? Possibly there are those out there who have more insights into this than I do.