One of the most important social transitions that takes place in adolescence concerns the emergence of sexual and romantic relationships. In contemporary society, most young people begin dating sometime during early adolescence.
Dating during adolescence can mean a variety of different things, from group activities that bring males and females together (without much actual contact between the sexes); to group dates, in which a group of
boys and girls go out jointly (and spend part of the time as couples and part of the time in large groups); to casual dating as couples; and to serious involvement with a steady boyfriend or girlfriend. More adolescents have experience in mixed-sex group activities like parties ordances than dating, and more have experience in dating than in having a serious boyfriend or girlfriend.
Most adolescents’ first experience with sex falls into the category of “autoerotic behavior”—sexual behavior that is experienced alone. The most common autoerotic activities reported by adolescents are erotic fantasies and masturbation.
Taken from : The Gale Encyclopedia Of Psychology 2ND Edition - Bonnie Strickland