In a study, scientists found that sleeping together was linked to 10% more REM sleep compared to sleeping apart, reports Inverse.

When couples slept together there were, on average, 5.4 REM disruptions during the night. When they slept apart there 8.5 REM sleep disruptions. That translated to longer uninterrupted REM sleep periods — they lasted on average about 22 minutes when partners slept together compared to13.4 when they slept apart. Still, this measure varied a lot by study subject, so it’s not a perfect comparison.