Nathoon is a 1974 Indian Malayalam film, directed by K Narayanan . The film stars Adoor Bhasi, Thikkurissi Sukumaran Nair, Sankaradi and Sreelatha Namboothiri in lead roles. The film had musical score by MS Baburaj.
Aravindan, a college lecturer, falls in love with his student Radha and marries her. However, the couple's sexual life is a failure, causing intense agony to Radha's father, Panikkar who is keen to have grandchildren. When all other means fail, Panikkar approaches a psychiatrist, who finds out that Aravindan's inability to have sex with Radha may have something to do with his intense affection for his mother, who had died just six months before Aravindan met Radha. How the doctor cajoles Radha into solving her husband's illness forms the climax.