The risks of sexual intercourse include unwanted pregnancy and contracting a sexually transmitted infection such as HIV/AIDS, which can be reduced with availability and use of a condom or adopting other safe sex practices. Sexual activity in general is associated with various risks. Sexual interest among adolescents, as among adults, can vary greatly, and is influenced by cultural norms and mores, sex education, as well as comprehensive sexuality education provided, sexual orientation, and social controls such as age-of-consent laws. Sexual interest may be expressed in a number of ways, such as flirting, kissing, masturbation, or having sex with a partner. Interest in sexuality intensifies during the onset of puberty, and sexuality is often a vital aspect of teenagers' lives.

Adolescent sexuality is a stage of human development in which adolescents experience and explore sexual feelings.