i donno if its quite that way HLF, usually girls will get married around the age of 23 or 24 and looking for serious relationships at that age, where as guys at that age still want to party it up. you could call it the difference in maturity, girl mature faster then guys. for guys they want to get married at like 26- 30 age range, and so its just a matching maturity levels. i think your partially right though, 24 to 18 is bad, but 24 - 20 wouldnt be that bad. i still wouldnt look down on people that go that far, 30 - 20 i would though or something along those lines.