How often do you find yourself waking up feeling irritable? How often do you find yourself shouting at the kids for no good reason?
If it is often, then the chances are you aren’t sleeping well.
After a goodnight’s sleep you’ll find you are able to react better towards others.
(Instead of wanting to eat their brains :)
This is because you are able to see when others are feeling happy, sad or angry more easily.
Like your body, your mind has had time to rest and recover, so it is able to recognise signs from others a lot faster.