When did couples start/stop sleeping in seperate beds?

I think it was in the 70s that married couples started sleeping in the same bed. However my husband and I were wondering when couples started sleeping in seperate beds? Did cavemen sleep in seperate areas? Fastforward to the 1800s, did they sleep in seperate beds then? In the movies that are portrayed in... show more I think it was in the 70s that married couples started sleeping in the same bed. However my husband and I were wondering when couples started sleeping in seperate beds?

Did cavemen sleep in seperate areas? Fastforward to the 1800s, did they sleep in seperate beds then?

In the movies that are portrayed in the 1800s I have only seen couples in one bed???

Thank you for any info you can provide.
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