This is the best time to have sex, according to science

According to clinical psychologist and author Michael Breus, there are four types of people in this world: dolphins, lions, bears and wolves.

Which category, or animal, you fall into is determined by your "internal rhythm" - based on sleep patterns and personality.

In an interview with the New York Post, the author explained:

There are certain times when our body is burning calories or producing more oestrogen, so it’s all about using that knowledge.

Breus, who has written about his findings in The Power of When, says these are the times different people should be...

Dolphin: 11:30pm - 6.30am

Lion: 10pm - 5.30/6am

Wolf: midnight - 7am

Bear: 11pm - 7.30am

Dolphin: 7:30am

Lion: 5:30pm

Bear: 7:30am or 12pm

Wolf: 6pm

Dolphin: 3pm - 9pm

Lion: 8am - 12pm

Bear: 10am - 2pm

Wolf: 5pm - midnight

Dolphin: 8pm

Lion: 6am to 7am

Bear: 7am or 9pm

Wolf: 10am or 10:30am

The best times to have sex, go to sleep and learn something new, according to a psychologist