fecalmaniac 

someone who loves doo-doo feces

If you go to ratemypoo.com, you are a fecalmanic.

fecalmaniac by goatcheese June 14, 2004

fecamania 

an individual's obsession with smelling, tasting, and touching, feces. Inflicted individual may excessively daydream and talk about feces.

"Guys I took the hugest poop today and it smelled nice."
--"That girl definitely has fecamania or something"

fecamania by lkjhcgjub January 15, 2011