If you've ever been turned down by your significant other after asking them for a cheeky bonk and worried it's because they may not love you anymore, fear not, it might not be that at all.
I mean, it could be, don't get me wrong, but a survey has suggested that it could simply be down to genetics.
According to a study conducted by adult sex toy giant Lovehoney, men and women just prefer to have a sex at different times of the day.
The survey, which polled 2,300 adults, found that nearly 70 percent of women say they've been with someone whose sex drive was completely different to their own - and that it was all down to timing.
Male participants stated that they prefer a bit of nookie first thing in the morning, somewhere between 6am and 9am.
However, women said they would rather get to it between the hours of 11pm and 2am.
And if you want to get even more specific than that, the exact time men are at their most alert is 7:54am, while women are ready to go at 11:21.
Dr Allison Hill, from Good Samaritan Hospital in Los Angeles, said: "The current thought is that female libido is very complicated, but most of it is psychological.
"And, usually, it doesn't have much to do with the woman's partner.
"Instead, it's more about how the woman feels about herself and her sexuality."
But sometimes you'd much rather have a cup of tea and watch some telly than get down to any of that business.
The popular British wildlife series returned to our screens last night (Tuesday 25 May) at 8pm - but many people were surprised that footage of hares getting down and dirty wasn't saved for a trashy late night spin-off. Springwatch: When Nature Gets Naaasty, or something like that.
Presenters Chris Packham and Michaela Strachan explained the mating rituals of the species as people across the country observed the hares getting at it - like rabbits.
First off, they detailed how males and females often fight during the copulation process.
Michaela said: "You may think it's male on male fighting for the rights for the female, but it's not.
"It's actually the ladies, the jills, fighting off the males, the jacks. They fight them off if they're not ready to mate yet, if the male is being too eager.
"I think that's a pretty cool avoidance tactic myself - when you've got a male with his amorous ego, you just give him a bit of a right hook, bit of a body blow."