One of you is too cold in bed, the other is stressed about the soaring costs of the heating bills. It's perhaps not surprising then that the heating of the home is the number one catalyst for rows between couples in winter, according to new research.
The study, by thermostat heating experts Honeywell found that the temperature of the house sparks the most arguments during the winter, with four out of 10 couples admitting that the heating causes at least two tiffs a day.
More than half of the 2,000 people questioned admit that they struggle to sleep in the winter because they are too warm. One third argue over one person wanting to have the heating on overnight.
When couples aren't arguing about the heat of the bedroom, they are sniping about when to turn the heating on.
A quarter admitted that they couldn't bear to have the thermostat turned up when the temperatures outside aren't that cold, yet one in ten revealed that they start turning up the heat as early as August.
"It's amazing something as simple as heating the house could cause so many disputes between couples," says a spokesperson from the study.
"It is a case of finding that balance between getting an agreeable temperature, saving energy and being able to afford the heating bills at the end of a cold spell but fitting a thermostat can certainly help keep heating bills lower and help stop rows."
Find out which other things couples argue about the most...
According to a recent study by home insurer, Esure, couples bicker on average 2,455 a year and arguing over sex is one of the biggest gripes - causing 87 rows a year.
The contentious subjects of money, overspending and debt rack up around 109 arguments a year, the study revealed. Many couples find themselves at loggerheads over bills and household costs on a daily basis.
Housework is also a big cause for contention, according to the study. Living in a 'dirty house' leads to 90 arguments annually, with 88 rows over dirty washing and 80 over one half treading mud into the house. Even simple things like who should cook the evening meal and getting in the way when someone else is cooking frequently end with a disagreement.
Children bring with them a whole new array of issues as couples disagree on the best way to raise them. The survey found the average couple will argue about disciplining their children 88 times a year - and have a further 79 disputes about spoiling them.
Snuggling up in bed and falling asleep with your partner may be the most intimate part of your relationship, but it is also a notorious catalyst for fall-outs. Some 102 arguments a year are sparked by a partner's loud snoring. Then, of course, there's the obligatory bickering about who is hogging the duvet.