This study will begin to generate data that will provide critical information on this topic and help inform future development of STI/HIV interventions tailored to womens' individual circumstances and contexts. The investigators hypothesize that women with 4 or more sexual partners during the past year will report higher rates of depression and substance abuse (alcohol and drugs), higher rates of intimate partner violence, less social support, more non-vaginal sex, more same-sex contacts, and higher rates of STIs than women reporting only one sexual partner during the past year.