Okami, Paul, Olmstead Richard, Abramson Paul R., & Pendleton Laura; Early childhood exposure to parental nudity and scenes of parental sexuality and scenes of parental sexuality; Archives of Sexual Behavior; 27(4, August 1998), 
As part of the UCLA Family Lifestyles Project (FLS), 200 male and female children participated in an 18-year longitudinal outcome study of early childhood exposure to parental nudity and scenes of parental sexuality ("primal scenes").
At age 17-18, participants were assessed for levels of self-acceptance; relations with peers, parents, and other adults; antisocial and criminal behavior; substance use; suicidal ideation; quality of sexual relationships; and problems associated with sexual relations.
No harmful "main effect" correlates of the predictor variables were found.