Feeder

The word "feeder" is usually used to in reference to a person who enjoys feeding another person. This is often for sexual reasons as the feeder is attracted to large bodies and the feedee is interested in becoming such a large body. However, the word was originally used in reference to scat. A feeder is a person who poops for another person. Where food is concerned the two roles are referred to as the feeder and the feedee. Where feces are concerned the two roles are referred to as the feeder and the eater. Some people will switch roles and others are strictly feeder or eaters. A feeder derives a sexual thrill from shitting for another and watching the other eat the excrement.