The Center for Disease Control doesn't actually suggest routine STD testing for men...but wait! There are exceptions to every rule. If you're a sexually active male and you're not having any symptoms of an STD, you may not need to be tested. But, if your sex practices include having sex with other men-even once or twice-you do need annual screening, including testing for syphilis, chlamydia, gonorrhea, and HIV, the virus that causes AIDS. Of course, it's also vital that you see your doctor if you're displaying signs of an STD. Doctors recommend getting tested if you have any unusual discharge from the penis. In addition, all warts, growths and blisters call for a check-up. Finally, the CDC recommends one HIV test at some point for all people between the ages of 13 and 64. The only way to be 100 percent protected from STDs is by never having sex-since that's probably not your choice, be smart about knocking boots!