It was once believed that not just many, but met their husbands, wives, or partners before college. Apparently, at one time this was true. When people got married much younger, most people met their partner in secondary school, high school, or college. One anecdotal statistic had it at 90%. Now, however, with people getting married later in life, the prevalence of Internet dating, and other factors, high school sweetheart marriages are becoming hard to find. So, when you meet that rare couple who have known each other since high school, it’s hard not to wonder what keeps them together. We dipped into some of the statistics, surveys, and studies on the subject of high school sweethearts to find out how common they are, and how long they last. Here are the surprising statistics about high school sweethearts.