That's already allowed. The rule is
>Do not post exposed genitals, bare female nipples, ...
Does this not grant you that freedom already? I've seen plenty of what you've described posted here already. Now, few will take kindly to you making such posts on /anthro/ but that is a freedom they're granted as well. Unless you're suggesting that the rules should be amended to protect such posts from such upset. That simply won't and shouldn't happen.