Sexually Transmitted Diseases
http://www.nlm.nih.gov/medlineplus/chlamydiainfections.html
http://www.emedicinehealth.com/sexually_transmitted_diseases/article_em.htmhttp://www.plannedparenthood.org/health-topics/stds-hiv-safer-sex-101.htm
http://www.mayoclinic.com/health/sexually-transmitted-diseases-stds/DS01123