Noticed after posting a image that the post contains "anal anal_penetration sex_toy_in_ass" all characters involved are feral birds with just a cloaca. I tried removing all 3 tags but it seems to ignore the edit. anyone know whats up with that? Might have missed another tag that just re adds anything anal related. https://e621.net/posts/3541631

Seems to be a result of pegging, which implies sex_toy_in_ass and anal_penetration.

pegging

This tag implicates anal_penetration, male/female, sex_toy_in_ass, sex_toy_penetration, male_penetrated, sex, toying_partner (learn more).

ok that was it, removed pegging and just kept strapon. Thanks

in the future you can use the Preview Final Tags button and it'll show you what tags are causing the implication