The initial responses to nipple didn't seem to be so much about the app itself, as much as its terrible grammar.
nipple also posted the rather regressive question “Did gender equality go to far?”
If nipple is going to mandate that, it should offer more options than black, white, Latino, Asian, and Indian.
1530s, nyppell, "teat, duct-laden extremity of a mammalian breast," alteration of neble (1520s), probably diminutive of neb "bill, beak, snout" (see neb), hence, literally "a small projection." In reference to an artificial device on an infant's bottle, from 1875. A 16c.-17c. slang term for a woman's nipples was cherrilets.
nipple nip·ple (nĭp'əl)
The projection at the apex of the mammary gland, on the surface of which the lactiferous ducts open, surrounded by the circular pigmented areola. Also called mamilla, papilla mammae, teat, thelium.