I recently posted female fingernails as clothes to the user repo (http://www.makehumancommunity.org/clothes/female_fingernails.html).
I wasn't too happy about them being categorized "clothes", so I played a bit with the MH source code. Now MH looks like this:
I made a feature request to implement something like this (http://bugtracker.makehumancommunity.org/issues/948. What do you think?