https://pubmed.ncbi.nlm.nih.gov/9681119/

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.

boys exposed to primal scenes before age 6 had reduced risk of STD transmission or having impregnated someone in adolescence. In contrast, girls exposed to primal scenes before age 6 had increased risk of STD transmission or having become pregnant.

It is suggested that pervasive beliefs in the harmfulness of the predictor variables are exaggerated.

Do the studies exist?

Anything is acceptable as a kink as long as you’re careful enough and enthusiastic enough!