When it comes to relationship milestones, we often think of meeting the parents or even having the first argument.

But as we all know, there’s a lot more awkward firsts along the way.

From the first sleepover to the first, erm, fart in bed, the first few months of a relationship can feel very revealing.

New research from Mattress Advisor has shown exactly how long it takes for men and women to feel comfortable spending the night with their significant other – and the results are pretty surprising.

Speaking to over 1000 people in relationships, Mattress Advisor found that compared to men, women move much slower when it comes to getting comfortable with sleepover habits like sleeping naked, showering with their partner or even wearing a retainer to bed.

But there is one aspect women are much more comfortable with than men.

According to the research, women are more comfortable snooping through their partner’s phone while their partner is asleep.

And men know it too – researchers also found that men were more anxious about their partner snooping through their phone overnight while sleeping at their partner’s house.

The Mamamia Out Loud team discuss why more women are opting to be on their own instead of in a relationship…

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The survey also looked at how many months it took for couple’s to get comfortable with each other.