PM, Chaverim:
If we follow your analysis to it’s logical conclusion. We should have many many older boys, as the new boys are constantly competing with the leftover boys for the new girls. You can’t have both all the new boys and the old boys marrying the same new girls. If as you say, no one wants the leftover girls, then there should be a whole shipload of older boys.
That being said, where are all these older boys.
Unless you claim that at present the are equal numbers of 27 year old unmarried girls and 30 year old unmarried boys.
That claim is preposterous.