A Daily Mail report describes findings suggesting that the timing of when a partner comes to bed can affect how quickly people fall asleep. The outlet says that when one person goes to bed and their partner arrives later, the disruption of that delayed arrival can delay sleep onset. According to the report, the additional time to fall asleep can be substantial—nearly 40 minutes longer—compared with scenarios where both people are in bed at the same time. The article frames the effect as coming from interruption of the bedtime routine and the resulting disturbance in the sleep environment. It does not provide detailed methodology, sample size, or the full statistical context in the excerpt provided, and it focuses primarily on the duration of time taken to fall asleep after a partner’s later arrival. Overall, the report indicates that synchronizing bedtimes may help reduce disruptions that can slow the transition from wakefulness to sleep.