Should i be concerned that a male doctor gets to see your breasts?

Not really . . .: . . .Since your doctor may need to examine many different parts of the body, not just personally sensitive ones like your breasts, but also eyes, ears, nose, throat, vagina, rectum, and all parts in between! you should be treated with dignity and respect; no one will "make fun" of anyone's "parts." ps: when doctors go to their doctor, our "parts" are seen also! female doctors see male "parts" too.