In other mammals, such as mice, voles, and hamsters, the VNO appears to play a vital role in several aspects of behavior, particularly mating. Removal of the VNO can be detrimental to the mating habits of rodents. Male mice and hamsters do not mate when deprived of both VNO and olfactory input. Even though the VNO seems to be vital in the mating habits of rodents, the changes in rodent behavior after the removal of the VNO could be caused by something else entirely. Changes in levels of LH caused by damage to the NT could explain behavioral changes in rodents after VNO removal.
People do communicate chemically.
The biochemical likeness between humans and other primates suggests that humans and rhesus monkeys could react similarly to the same chemical stimulus. Yet, the relationship between these chemical communicators and the human VNO are still not clear. The human VNO seems to be a possible factor in human behavior. While the role of the VNO in human chemical communication has yet to be established, circumstantial evidence suggests that the VNO could actually influence human activity. The commercial interest of the fragrance industry in establishing the reality of a functioning VNO will speed research, but the resulting data could definitely be distorted to suit the needs of the companies funding the investigations.