"When a married woman I've met through an online site expects to be paid for sex, it makes me furious. Women in their early 30s were in their prime during the economic bubble era, right? They're spoiled rotten. Go out to a restaurant and they order the most expensive meals and they never stop demanding something. Sometimes, I really feel like punching them out," says a man who wishes to be identified only as Shinji.

"High schoolgirls simply charge too much. Yet, when they finally get into bed, they just lie there and let you do all the work. It's meaningless going out with them. You feel like reminding them who's paying for the session.

"Junior high schoolgirls don't have a lot of cash, but they don't really need it, either. They'll charge anywhere from 10,000 yen to 15,000 yen, though I've heard of some cases where they'll go for as little as 5,000 yen."