Editing Deltan (section)

==Physiology==
[[Image:Ilia.jpg|thumb|250px|right|Ilia, a Deltan female]]
Deltans largely resembled Humans with the exception of having no surface hair except for eyebrows, lashes, and (occasionally) a very thin layer of soft down along arms and legs. They are, on the average, slightly slimmer than Humans, and their cheekbones, eye shapes, and jawlines are slightly more symmetrical, Humans (and many other humanoid species) often find Deltans quite attractive. (Decipher sourcebook: Starfleet Operations Manual) Deltans were telepathic and empathic allowing them to sense other peoples emotions and administer medical aid by absorbing and minimising pain, this "Mind-meld anesthesia" meant Deltans made excellent medical personnel.

Deltans were perhaps best known for their high sexuality, both sexes emitted some of the most potent pheromones know to Federation science. As a result Deltans were something of natural aphrodisiacs, most intensely among their own race, but with a strong effect on most other humanoid species. Because of this Deltans swore an "oath of celibacy" when serving in Starfleet, they also developed chemical applications to diminish their pheromonal effect. To limit exposure to Deltan pheromones off-world visitors are not permitted to visit Delta IV itself, instead being restricted to the planet's moons Seyann and Cinera. (TOS movie: The Motion Picture; ST references: The Worlds of the Federation; Star Charts)

The Deltan oath of celibacy served not only to curtail sexual promiscuity with other races but also ensured the safety of non-Deltans; the long evolvement of the Deltan race not only heightened their sensuality but has also resulted in the sex act becoming a complete union in which both body and mind are shared. For Deltans this was natural and pleasant, but the experience of actually becoming part of another persons mind almost always incapacitates a human partner. It was sometimes said that a non-Deltan who entered into a physical relationship with a Deltan risked insanity. (TOS novelization: The Motion Picture)