Biased people, especially old people, sometimes imply or even direct say that there exist behaviors that men/women can't do. Crying is regarded as a prohibited behavior for men, for instance. There is even a saying that a man can only cry three times in his entire life. However, if you ask yourself why, you will not find any logical reason behind. In my opinion, a conviction that can't be justified is never a good one to have; it just limits your thought = thoughts and makes you prejudge about something and thus you are actually losing some chances that you could get if you were open-minded. Everyone deserves to cry when sad.