Researchers have generally neglected sexual experiences of boys with adults, assumed them to be the same as those of girls, or tried to understand them by referring to clinical research while ignoring nonclinical research. A review of nonclinical research allows a more complete understanding of boys' sexual experiences with adults and the outcomes and correlates of those experiences. Research with nonclinical samples reveals a broad range of reactions, with most reactions being either neutral or positive. Clinical samples reveal a narrower, primarily negative, set of reactions. Comparison of the reactions of boys and girls shows that reactions and outcomes for boys are more likely to be neutral or positive. Moderator variables, including presence of force, perceptions of consent, and relationship to the adult, also relate to outcomes. Incestuous contacts and those involving force or threats are most likely to be negative. Problems in this field of research include broad and vague definitions of "abuse" and conflation of value judgments with harm. Effects of boys' early sexual experiences with older persons in general cannot be accurately inferred from clinical research alone or from girls' experiences.