though I didn't know about the subsequent crackdown...

http://www.snopes.com/risque/kinky/panties.htm

The article is pretty well researched and manages to touch on a number of common Japanese sexual/fetish scenarios (and both roricon and bura-sera are still in effect; witness the late-'90s rise of teen prostitution known (i believe) as shojo-shobai). It<'s my understanding that all of these fetishes turn up even in non-hentai adult manga with some regularity.[br />