Well it depends. It's a sexist riddle, I'm not going to go into the depth of the riddle, but the reason most guys won't get this riddle is because they are naturally sexist thinking only a man can be a doctor. Now you're either gay or a woman to make a comment like that, which is cool also.

Haha I wanted to say it's only hard if you're sexist but I didn't want you to think I was accusing you...