Really, you can!
Begin having these conversations as early as possible, which will in turn help you delve into deeper topics such as STD's, Knopf, A. (2015) suggests having starter conversations in the car, the casual setting will not only reduce the awkwardness but also open the floor for conversation to flow. Remember to use encouraging and nonjudgemental attitudes towards the topic of sexuality with your child, Gilbert (2015) presents findings that many parents believe "sexuality arrives from the outside to ruin the innocence of childhood". Instead, I suggest an approach which celebrates the coming of adolescence, a time of discovery, character building, and family unity through education.
Bell, R. (1998).Changing Bodies, Changing Lives: Expanded Third Edition: A Book for Teens on Sex and Relationships.Potter/TenSpeed/Harmony.
Gilbert, J. (2015). Not My Kid: What Parents Believe about the Sex Lives of Their Teenagers. Social Forces, 94(1), 1-3. doi:10.1093/sf/sot088
King, B. M. (2014). Human Sexuality Today (8th ed.). Upper Saddle River, NJ: Pearson/Prentice Hall.
Knopf, A. (2015). Talking to your child about sex, sexuality, and health: Facts + love = success. Brown University Child & Adolescent Behavior Letter, 311-2.
PERRIN-WALLQVIST, R., & LINDBLOM, J. (2015). COMING OUT AS GAY: A PHENOMENOLOGICAL STUDY ABOUT ADOLESCENTS DISCLOSING THEIR HOMOSEXUALITY TO THEIR PARENTS. Social Behavior & Personality: An International Journal, 43(3), 467-480. doi:10.2224/sbp.2015.43.3.467
Sarabia, I., & Estévez, A. (2016). Sexualized behaviors on Facebook. Computers In Human Behavior, 61219-226. doi:10.1016/j.chb.2016.03.037