Retepsians are a race of space flight-capable humanoids of the planet Retepsia. Currently, the only known Retepsian is Darulio, a forensic archaeologist employed by the Planetary Union.You know what they are? They got the blue skin; they got the scales; the stuff that comes out of the forehead. It's, like, a whole weird mess.— Ed Mercer on Retepsians
According to Darulio, Retepsian culture considers it rude to decline offers of sexual intercourse.
Retepsians are roughly the same height, shape, and physique as Humans. Unlike Humans, however, Retepsians are hairless, have blue skin and cleft ears, and feature a column of prominent ridges down the center of their foreheads.
At least male Retepsians are known to eject a blue liquid from their foreheads during intercourse and, when in heat, produce a powerful pheromone through skin contact, which induces lust and mania.
Retepsians can emit a loud noise from their mouths, similar in sound to the squawk of a parrot or macaw.