I'm not saying it shouldn't I'm just saying there isn't some magical barrier that protects men against pressure to have children. Both men and women have a biological clock, women start to produce less eggs and those that are produced are of lesser quality, same thing happens with sperm. There is direct correlation between health problems, IQ and various other factors to the age of both parents not just the woman. At least as far as Europe goes from my personal experience having kids trumps marriage here, you'll see far more unmarried couples in a long term committed relationship (2-3+ years) with kids that are not married than in the US.