A slightly popular Japanese fetish. This involves the paraphilia of penises where the nipples on a woman's body (or possibly a man's) would occur. This is only
illustrated in hentai, and probably the imaginations of kids that don't really
understand sex too well.
(It is also present, but fiercely underrepresented, in America, but only in illustrated or furry porn.)
This is commonly juxtaposed with futanari, hyperphallic, and sexual
defecation, but very rarely used with lolicon.
An inexplicably common subfetish is shitting nipple dicks, in which shit comes out of the nippledicks.