The tag alias #58808 nipple_outlines -> nipple_outline has been approved.
Reason: Alias the less-popular plural (5) to the more-popular singular (36,000+).
Pretty sure they both mean the same thing - when you can't see the nipple itself, but you can see a bulge in the clothing or fabric over it.
EDIT: The tag alias nipple_outlines -> nipple_outline (forum #344085) has been approved by @bitWolfy.
Updated by auto moderator