 A person's own level of attraction, rather than their gender, may lead to over or under-perception.The exact mechanism for this is unclear but it is suggested that individuals may project their own level of sexual and commitment interestedness on to their interaction partner, whether they are in a relationship with them or they were strangers before the interaction.The Aesopian fable of The fox and the grapes gives another possible explanation as to why males fall victims of underperception.