Why yes, shit I believe has no fat. Very observant.
http://www.medfriendly.com/feces.html " WHAT ARE FECES MADE OF?
If you have ever wondered what feces are made of, you have come to the right place. Feces are mostly made of water (about 75%). The rest is made of dead bacteria that helped us digest our food, living bacteria, protein, undigested food residue (known as fiber), waste material from food, cellular linings,
fats, salts, and substances released from the intestines (such as mucus) and the liver. Although feces are made up of about 75% water, this number varies from person to person, depending on how long the feces stay in the intestine. Since the intestines absorb water from the feces, diarrhea (poop that passes quickly through the intestines) will contain more water and retained feces (which stay in the intestines for a longer amount of time) will contain less. Another point worth mentioning is that fiber helps feces pass along the intestine."