Interpersonal sexual play often occurs between children of the same sex and can include siblings.
1, 8 Sexual play typically occurs among children of similar age and ability who know and play with each other, rather than between strangers. Sexual play is distinguished from problematic behaviors in that childhood sexual play involves behaviors that occur spontaneously and intermittently, are mutual and noncoercive when they involve other children, and do not cause emotional distress. PERRIN, in Developmental-Behavioral Pediatrics, 2008 SEXUAL PLAY
