Mistress Gaia believes in shit fetish. She does not like to dwell on small things. She prefers to punish a slave once and for all and get lasting results as opposed to punishing a slave all the time for all manner of small mistakes. She thinks that is petty and that it is a waste of her time. She used her shit fetish to make sure her slave never messed up again. She fed it to him after tying him up.