Society and culture
Iyaarans reproduced by post-cellular compounding, emerging fully-grown from natal pods, and as such had no children like Humans. They regarded the consumption of food as being for sustenance only, and their diet of bio-enzymatic supplement was bland in the extreme by the standards of many other humanoids. Iyaarans had no natural understanding or social forum for concepts such as pleasure, antagonism, or love. When Iyaarans are injured, their metabolic rates slow down in order to promote healing, making it look like they are dead. The Iyaarans used a small device, worn as a necklace, to assume the appearance of other humanoids and other genders.
The Iyaarans conducted their first cultural exchange with the Federation in 2370. During the exchange they explored certain concepts by assigning an ambassador to each. While Ambassadors Loquel and Byleth succeeded in their studies of pleasure and antagonism, Ambassador Voval felt he failed to understand the nature of love. (TNG: "Liaisons")