The Channel of Mating (6-59) is one of the thirty-six channels of the Human Design bodygraph, a system originated in 1987 by Ra Uru Hu and described here as a modern esoteric framework rather than an ancient tradition. A channel is a defined pathway joining the Solar Plexus centre and the Sacral centre, and it is completed by two gates: Gate 6 ("Emotional Friction") and Gate 59 ("Intimacy And Bonding"), whose numbers come from the King Wen sequence of the I Ching. The channel idea and its Tree-of-Life-style pathways, the gates' I Ching numbering, and the centres' chakra roots were combined for the first time in the 1980s; the channel is part of that composite, presented as the system's own model, not as verified fact.
In the system's own account, the Solar Plexus centre carries emotional awareness, read not as a fixed state but as a wave moving between poles over time, and the Sacral centre carries life force and work energy, read as the body's own generator and its yes or no gut response; the channel is read as a direct circuit between those two functions whenever both gates are defined in the same chart.
The same two numbers appear elsewhere in this atlas as Gene Keys 6 and 59, Richard Rudd's later, contemplative reading of the identical hexagram pair. Gene Key 6 runs from the Shadow of Conflict through the Gift of Diplomacy to the Siddhi of Peace; Gene Key 59 runs from Dishonesty through Intimacy to Transparency. Rudd's system drops the bodygraph and its channels entirely, so this particular pairing is a Human Design structure only, with no equivalent in his contemplative method.