Hahah. DIRTY DIRTY CICHLIDS.
Taken from here.News of the Weird said:Cutting-Edge Science
Males Will Be Males: University of Lausanne (Switzerland) researchers discovered that not only are cichlid fish oriented to "oral sex" (because the female stores fertilizable eggs in her mouth) but that studlier males have evolved a trick to get females to open up: Super-procreative males create egg-like growths on their fins, which females imagine are their own missing eggs and try to suck them up, thus improving the male's opportunity to slip sperm in, according to a November report in New Scientist. [New Scientist, 11-15-07]