You could always go here:
http://www.fictionmania.tv/search/exactmultisearch.html and select the Body Suits category now that that site is back up. Lots on there, but they aren't my personal favorite so I don't have any selections for you really.
Only one I can think of that I really like is a Ranma 1/2 Fanfiction:
http://www.angelfire.com/anime/next/SCP/S/nhb.html . But that is not sexual so doubt that'll be what you're looking for.