@LunalaTranslations and anyone else who finds this gallery interesting: the "Awkward Sex" pool on Danbooru is worth checking. Its scope is wider, but it includes numerous potential additions.
Pool URL: https://danbooru.donmai.us/pools/2531
Examples (these ones originally from Pixiv): https://danbooru.donmai.us/posts/662559 * https://danbooru.donmai.us/posts/655623 * https://danbooru.donmai.us/posts/1193376