I'd use it for the challenge factor, I'd even be cool with a "fig-leaf" name such as "filth" as suggested in another forum. And it should definately be an init option.
That being said, It shouldn't be a main factor and should only be added in to round out the "Accuracy" or "realism" that toady was going for. (Also have you not seen the Succubus/incubus mod someone's already made genitals)
On a side comment that'll likely sound like a flame but really just something I find interesting...
Spoiled for ability to completely ignore statement.
So many folks want more textual blood/guts/gore/murders/rapes/pillaging, yet urine and feces are a step to far? anyone else find that sorta funny?
However I'm also aware not everyone wants the Wound/Gore system to go farther than it already has.
tl;dr I'm for it in the face of a challenge, not because I want to play Dwarf Fortress: The Dung Ages.