Though the mechanics of reproduction are similar to humans and other earth mammals, the Na’vi’s unique physiology provides them with a level of intimacy unknown on Earth. When an appropriate mate has been selected (which can take many years), the male and female Na'vi will connect queues to create an emotional bond that lasts a lifetime. The intertwining of queues, called “Shahaylu”, creates a state of unified body consciousness in which both parties access the physical sensations of the other. While not erotic when used for the control of animals, during mating it creates a heightened awareness of the other person. This leads to an experience similar to the prolonged state of arousal and deep spiritual connection found in some Tantric practices on Earth, but considered by the xenoanthropology community to be much more profound. A single instance of this bonding ritual leads to a life-long pair bond. The actual reproductive act, which resembles human intercourse, follows the bonding ritual, and the partners remain in a “linked state” during and for some time after the sex act itself.