Many men assume that if they use a condom correctly every time they have sex, they're probably free of sexually transmitted infections (STIs). However, some STIs are asymptomatic -- you can be infected with them without having any symptoms. Symptoms make take awhile to appear after infection, or you may think that it's something else. For this reason, you need to have a frank discussion with your doctor about your sexual history and any symptoms you may have -- including pain or burning while urinating, a discharge or any type of bump. Even curable STIs can lead to long-term problems if left untreated.
Another potentially embarrassing question to ask your doctor has to do with your sexual function -- or rather, dysfunction. No man wants to admit that he's having difficulty getting or keeping an erection, but erectile dysfunction affects more than 18 million men in the U.S. alone [source: WebMD]. This condition can be detrimental to your sex life and your self-esteem, but did you know that it can also be a symptom of a more serious condition such as heart disease or diabetes? Some medications can also cause impotence. There is a wide range of treatment options for ED, so there's no reason to suffer in silence.
Finally, if you're considering starting a family, keep in mind that male infertility is the cause of a couple's fertility issues about half the time [source: Mayo Clinic]. If you and your partner have been unable to conceive after a year, discuss it with your doctor.