To better understand the extent of same-sex behaviors in adolescence, researchers analyzed a large, nationally representative sample of youth age 15-21 who were not married or living with a partner (McCabe et al., 2011). While only 3% of males and 6% of females in the 2002 survey described themselves as “homosexual” or “bisexual,” higher numbers—4% of males and 11% of females—reported that they had engaged in same-sex activity. Clearly, describing oneself as either “gay/lesbian” or “heterosexual” does not necessarily rule out bisexual behavior, especially among young women. A counter-intuitive finding of this study was that females who identified themselves as lesbian or bisexual or who reported same-sex attraction were more likely to engage in sex with males than were females who identified themselves as heterosexual.