I’ll read it every night just liked you asked.

like

It had several labels pointing to each part: clitoris pointing to a large round pearl at the top, nestled between two thick lips labeled as the labia.

Hmm a pony manual would probably be made with the "normal" orientation so with the clitoris at the bottom, as that is the most common way to see it.

at the self-induce surprise

induced

the entire mare’s crotch was on display

Hmmm I think that this is only used for humans or at most primates...

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I've definitely seen the areas between any creature's legs called the crotch in the furry community, even on ferals, as well as all over the brony community. It's possible that it biologically only applies to bipeds, but that doesn't match common usage.