Frankly, it's never bothered me. Think about it: do you believe that shows like "Boston Public" give the public a realistic image of teachers? Do you think that "L.A. Law" and "Ally McBeal" are true-to-life lawyer shows? Of course not.
Nurses will always be the object of male desire, just like the "uptight" teacher or librarian seducing a young boy -- remember Van Halen's "Hot for Teacher"?
I don't really think the problem is media's portrayal -- more like nurses' sensitivity.
As a male nurse -- or "murse" as they say on "Scrubs
" -- I'm not offended by media jokes. I take it in good stride just as, I'm sure, female doctors or male nannys do. BTW, I know many doctors that roll their eyes at the portrayal of physicians on show like "ER". The difference, I think, is that they've learned that confidence and respect come from the inside, not from media portrayals.