If you're more creative you're more likely to sleep on your left hand side.
If you're more extraverted you're more likely to sleep closer to your partner, which can also mean you're more likely to have a better relationship.
A 2014 survey carried out by the University of Hertfordshire found that 12 per cent of couples spent the night less than an inch apart, and of these 86 per cent were happy with their relationship.
On the inverse, two per cent slept further than 30 inches apart. Among these couples, the amount who were happy with their relationship was only 66 per cent.
The lead author on the survey, Professor Richard Wiseman, said:
One of the most important differences involved touching, with 94 per cent of couples who spent the night in contact with one another were happy with their relationship, compared to just 68 per cent of those that didn’t touch.