As humans are mammals, it is possible, perhaps even probable, that we have pheromones (chemical signals). However, there is no robust bioassay-led evidence for the widely published claims, started by a corporation interested in patenting them, that the molecules androstadienone and estratetraenol are human pheromones. Instead, if we are to find human pheromones, we need to treat ourselves as if we were a newly discovered mammal, and use the rigorous chemical methods and bioassays already proven successful in pheromone research on other species.