Drug use and sexual risk behavior are strongly linked to risk for contracting HIV. Using national data from National Longitudinal Study of Adolescent Health (Add Health), we will examine whether there are relations between drug use and sexual behaviors. Interpret the association between number of lifetime partners and the age of "Partner 1 " (note: "Partner 1 " is the subject's current partner) Having an older partner is moderately associated with having more lifetime partners Partner's age isn't related to number of lifetime partners Partner's age is moderately related to number of times had sex Having a younger partner is related to having fewer sexual lifetime partners