@Undead dragon soldier
Amount of butt mainly matters if we believe there's naughty bits involved, not really on ponies (they show a lot of butt all the time in the show).
Note in regards to the original's rating that there was a time when simply having bedroom eyes was rated Suggestive in and of itself, which was extreme because it meant that there were screencaps that were only being rated Safe out of being given an exception; ratings rules that change based on where something came from, make tricky questions about scene interpretations, and make us more prudish than an American kids show
aren't good. @Damaged
In general for this I'd say you have to consider what they're actually doing
, that's why the "wiggling a butt" example is used; posing the body itself isn't really something.
I'd love a wording that actually slices this in an objective way, but it's probably just not possible without going crazy and putting even a hoof spreading a butt at Safe.