In agreement with @teacake.
That’s kind of the point, the forum is, as far as it can. You’ve just demonstrated @Iwill (in the other thread) that sites showing female nipples rank lower on search engines because they are classed as “adult” sites.
The search engines dictate that business’s who want to rank highly can’t show female nipples, because for some reason they are “pornographic”. The forum management, i.e. Brenna, has to abide by not showing female nipples but doesn’t like that inequality, so, has chosen to highlight the stupidity by putting a blanket ban on all nipples here on the forum.
So, yeh, I agree with you that search engine rules on “pornography” are stupid but it’s their decision that female nipples can’t be shown here. It is Brenna’s decision that male nipples can’t be displayed either in order to promote equality, encourage discussion and highlight the issue.