Hey I'm not saying it works out but it is fairly common. I can sort of understand being in love in high school and wanting to start a life together by getting married though.
Oh, yeah, true. I'd say it's becoming uncommon here, but that is partly due to de facto relationships being more socially acceptable (and legally acknowledged) than over your way. Hell, my aunt and uncle aren't actually married, but because they're de facto, they have all the legal standing of a married couple, and have been together since high school (aforementioned uncle turned 50 this week). So a lot of people here will move in with their partner when they go off to university and essentially live like a couple, but not bother to get married until well into their twenties, assuming the relationship even lasts. Kate gave me the distinct impression this was socially unacceptable in many quarters of the US, and it was one of her prime arguments why we would not flat together at university.