I popped over and checked out your auctions, and 
the problem was probably that you had the 
word "nude" in the item title.  Since there are 
so many auctions, and it would be insane to try 
to check each and every one, they go by key words 
in auction titles.  If you have the word "nude" 
in the title, it's going to be assumed there is 
nudity in the item.  If you had said something 
like "hot spring" or "bath" (or where ever they 
are) you wouldn't have a problem.  Yeah, that can 
be kind of a harsh way to do it, but I know they 
got tons of complaints about adult-related 
auctions, and that's why they cracked down harder 
on auctions like they have been.