“…For example, adolescent cigarette, alcohol, and marijuana use is related to that of friends and potential friends (Aloise-Young, Graham, & Hansen, 1994;Dembo, Farrow, Schmeidler, & Burgos, 1979;Hartford, 1985;Urberg, Degirmencioglu, & Pilgrim, 1997). Similarly, researchers have found that youths' sexual behaviors are linked to the norms and behaviors of their peers and friends (Dolcini & Adler, 1994;Morrison, Baker, & Gillmore, 1998;Prinstein, Meade, & Cohen, 2003;Walter et al, 1992), and that youth tend to be similar to their friends with respect to sexual behaviors, expectations, and feelings (Billy, Rodgers, & Udry, 1984).…”