How would the society change if it was illegal to have sex outside marriage and people could not re-marry after they already married someone?

Anonymous
For this question, imagine that the government could reliably identify everyone who is having sex outside marriage (e. g. using chips in people's bodies) and there were severe punishments for doing so (years in prison, chemical castration or death sentence in places where death sentence is legal). You could marry a person, but only for the entire life.
Updates:
9 mo
I forgot to say that in this example people would be able to remarry if their spouse died, but not if they murdered them.
How would the society change if it was illegal to have sex outside marriage and people could not re-marry after they already married someone?
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