Sexmons are creatures that are addicted to sex. They are so addicted to sex that their genitalia are evolutionarily hypertrophied. Their males have unusually large penises for their height. Their females have unusually deep vaginas for their height. Sex is also a social element for them, in which they express their feelings, desires and hierarchy. In order to build a hierarchy, they do not use physical force, but use their sexual abilities. Therefore, the pack may not necessarily be headed by a physically dominant male, but may be led by a weak female with strong sexual skills. People have discovered that sexmons are very smart and social. They are several times smarter than chimpanzees, and they are much easier to train than dogs. But the main use for sexmons has become sex battles, in which human trainers control their sexmons in a battle. In this battle, the winner is the trainer whose sexmon makes another experience an orgasm first three times. All fights are held in a special arena with spectators.