According to this: https://flowingdata.com/2017/11/01/who-is-married-by-now/ https://flowingdata.com/2017/11/01/who-is-married-by-now/ 80% of men are married by

According to this: https://flowingdata.com/2017/11/01/who-is-married-by-now/ https://flowingdata.com/2017/11/01/who-is-married-by-now/ 80% of men are married by 43 and since the author was a kid in the 70s according to his website, he is most likely more than 43 anyway. The chances of him being married to a woman are closer to 90%. The joke was at the expense of geeks in general, who often find themselves explaining something with excitement to their partner (in this case, most likely a wife - more importantly, this doesn't matter at all) only to receive a disappointingly laconic answer.