Although it is not yet clear what boyhood behaviors indicate an adult homosexual outcome, femininity is one reliable marker. The earlier and greater the femininity, the more likely will it be resistant to treatment, in childhood or adult life. Once an evaluation has revealed the femininity is intense, treatment should quickly begin and, when possible, include both mother and father. If the boy is to become more masculine, his mother will have to allow—encourage—him finally to separate from her, and his father will have to start serving as an adequate model for masculinity.