STDs are spread through sexual activity and affect women and men. Condoms, when used correctly, are a good way to prevent STDs. Some common STDs in men include HIV and AIDS, gonorrhea, chlamydia, and syphilis. See your doctor if you experience symptoms of STDs such as abnormal discharge, pain, itching, or a rash in the genital area. Some STDs can be cured while others will require long-term treatment to manage symptoms. Follow the links below to find WebMD's comprehensive coverage about how STDs are contracted, symptoms of STDs in men, pictures of STDs, and much more.