Spoiler alert: If you’re a mom already nervous about raising her son, this will do absolutely nothing to ease your nerves.

A new study published in the journal Child Development suggests that mother-son bonds are crucial in determining how the boy behaves in his teen years. Coincidentally, the new film “We Need to Talk About Kevin” (starring Tilda Swinton and John C. Reilly) also deals with the subject of delinquent sons and motherly love. Watch the trailer below at your own discretion.