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When a vegetarian proceeds to expell excrement from their sphincter onto their partners face. The resultant faeces acquires a particular green aesthetic, hence the strict non-meat diet.

In extreme cases, some have a particular fetish for herbivores rather than humans i.e A horse
"Tonight ... I'm all yours"
"Are you prepared to have a guacamole facial?"
by Rhymeonocerous April 22, 2017
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