A new study has revealed that couples fight often because of lack of sleep, which usually makes a person grumpy, eventually leading to a fight.
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A restless night can also make people late for work and more likely to lose our wallets or phones. And it makes parents more bad-tempered and likely to scold their children.
Six percent admitted that they have left their home unlocked while five percent have had a road accident caused, in part, by tiredness.