I'm always looking for a manga or story or otherwise that focuses more on a specific topic rather than just having one or two panels of it.

Does anyone know of any focusing on either skinning, debreasting, decunting?

on the less guro side; nipple fuck, womb prolapse/fuck, urethra fuck?

Anyone know anything?

I've found a few I might be able to find again I'll post a link if I do.