fucking hell does pixiv have shit tagging, does it not. a single letter or series letter number off and you miss it all, fucking hell. '
its not that much better but tryhttps://cure.ninja/booru/
it searches a bunch of boorus. a search for some fucked up shit like "intestinal_bulge" on any individual booru will get you like 9 results, but on here it gets me like 80. dont forget to add an * on the end a search term to find all variations, like oral*, to get oral insertion and oral gagging