If you think you're not at risk of getting a sexually transmitted disease, think again. One in four Americans has an STD, the highest rate of any industrialized country in the world. Aside from celibacy, it's having the knowledge you need. Take our quiz to see if you know how to keep your sex life safe and healthy. One in five 2.
Men can catch yeast infections from women.
True False 3. If you have sex with many different partners, your risk of cancer may be increased. True False 4. If you have one STD, you're more likely to catch another. True False 5.