Being a man is about serving others and sacrifice, not serving oneself- (no offense but it is from a conservative- traditional point of view. Christ, Islam, Confucianism, etc and other organized religions/cultural belief systems around the world share this theme- it is also what keeps marriages in-tact).
The definitions of a what is manly behavior or not of course varies, the left-liberals have a lot of definitions lol
I personally put great value on family, relationships, and children and am aware of what a profound sacrifice it is, and not everybody is into it. (which is OK)