Yes, the Duke of URL strikes again. I found a Japanese BBW art site that has some sort of comic about fat girls boxing nude. Definitely not for the slightly squeamish though; you may know about some of the hentai habits of Eastern art, and if you don't, you will upon seeing this.
http://pksp.jp/fatlove/alb.cgi?m=&o=1&ss=&ps=&km=&pp=1
http://pksp.jp/fatlove/alb.cgi?m=&o=1&ss=&ps=&km=&pp=1