It depends on the cultural setting. In Chile could have been possible 60 years ago. (Not now)
My inlaws were 16 and 30 when they marry. He was a workman and she a country girl. Back then in 1958, it would have been frown upon in other social class but not unusual in lower social classes.
But it was possible for upper classes one generation before them:
My mother in law was a high school student when my grandpa started teaching her as a history teacher at her school. They both came from very posh families. They fall in love....and my great grandparents decided that my grandma has to drop out from school so they continue their courting.
Both my grandparents and my in-laws had very happy marriages.
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My inlaws were 16 and 30 when they marry. He was a workman and she a country girl. Back then in 1958, it would have been frown upon in other social class but not unusual in lower social classes.
But it was possible for upper classes one generation before them:
My mother in law was a high school student when my grandpa started teaching her as a history teacher at her school. They both came from very posh families. They fall in love....and my great grandparents decided that my grandma has to drop out from school so they continue their courting.
Both my grandparents and my in-laws had very happy marriages.