The term censorship and its subsequent action typically involve a body or person "shielding" others from what they deem obscene, threatening or endangering. For some reason, nipples—specifically those perceived as "female"—consistently fall under the category of "obscene."
Instagram's Community Guidelines explicitly ban female nipples, except under circumstances such as breastfeeding or "health-related situations (for example, post-mastectomy, breast cancer awareness or gender confirmation surgery) or an act of protest." However, there is no matching ban on male nipples. Similar to Instagram, Tumblr's Community Guidelines don't allow "female-presenting nipples," which is a confusing and verbose way of trying to sound inclusive while still perpetuating sexualization.
As conversations about gender expand, social media guidelines (and who gets to decide what gender a nipple belongs to) become obsolete. By showing up-close images, the Instagram account