Why Men Marry Younger Women?

I think the data used for the study is only from the USA, but the scenario is so similar to India. It indicates that this trend is a universal one and not specific to our country.
 

“Men tend to marry younger women. The age gap averages 1.74 years, according to a study of U.S. marriages by Javier Díaz-Giménez and Eugenio Giolito of IESE Business School in Spain. The reason is that men are capable of producing children for a longer time than women and thus, when they are older, are more likely than women to marry. Grooms’ median age at first marriage is 26.63 years; brides’ is 24.80.”