However , when these promises of marriage became due , fifteen or twenty years later , they were taken less and less seriously .
But still , in the 1970s , it was in no way unusual to make agreements regarding newborns about eventual marriages .
When these promises of marriage became due , fifteen or twenty years later , they were taken less and less seriously .
But still , in the 1970s , it was in no way unusual to make agreements regarding newborns about eventual marriages .