Tone is convinced that his son is a sex maniac because he is supposedly looking under his teacher's skirt. But he is wrong. While he is obsessed with trying to find the reasons for his misfortune and even makes his wife miserable, his friend hints that sexuality is a matter of genes; Tone comes to a conclusion that he himself is a sex maniac.

Tone je zmotno prepričan, da je njegov mali sinček seksualni manijak, ker naj bi učiteljici gledal pod krilo. Medtem, ko obsedeno išče vsemogoče razloge za svojo nesrečo, in spravlja v obup svojo ženo, mu prijatelj namigne, da je seksualnost stvar genov in Tone pride do zaključka, da je seksualni manijak pravzaprav on sam.