Ten unnecessary ridiculous facts that you're glad you know now

Fish can get seasick, a rainbow is always the same size, and our DNA contains an average of four hundred errors. Do with it what you want, but I enjoy it: tickling my brain with facts that are completely useless. Today again on offer: did-you-know facts about the human body that don't matter at all, but are great for birthdays. Here it comes.

1. Say whuuuuuut. The very first men on earth had a penis with spikes. This shit is true. It is believed that they provided more pleasure or that they could induce ovulation in women. Now extinct due to evolution – thank god – but some monkeys still have spiky penises. Yikes.

2. You may have never thought about it, but when we walk, we actually ‘fall’ forward. By swinging your leg and leaning on the foot turned forward, you prevent yourself from falling.

3. Strange but true. There is not a single muscle in your fingers. The muscles that move your fingers are all in our forearm. Your fingers are moved like puppets on a string.

4. The less you know, the more you think you know. This is also known as the Dunning-Kruger effect. The two psychologists proved in 1999 that those who do not realize their own, well, let's call it intellectual shortcomings, have a much more positive view of their own abilities. Could this also be the case for those types who participate in Idols?

5. We breathe through one nostril at a time. Just test it by pinching both of them shut for a moment. The ‘other’ one still works, but less. Strangely enough, the nostril alternates, allowing you to breathe comfortably after a few hours. This is also called the ‘nasal cycle’. Say whut.

6. An opera singer can damage their own hearing. A gooooooood note can reach 120 decibels, and hearing damage can occur with exposure to just 90 decibels. And then try explaining to people that you sang yourself deaf.

7. The longer the winter, the larger our eyes and brains are. Additionally: the further north someone lives, the larger their eyes are. For example, the eyes of someone from Greenland can be up to one-fifth larger than those of someone from Central Africa.

8. Wooooo, in the category ‘you'd rather not know’. There's a good chance you have eyelash mites. These tiny creatures live on the dead skin cells of your eye. About half of the world's population has them, and the chance increases as you get older. Brrr.

9. We are blind for forty minutes every day. It can be for very short moments, you know. Just look quickly to the left. In the time it took your eyes to do that, you were temporarily blind. This is also called saccadic masking. Your brain shuts off your optical nerve; otherwise, you would be seeing from a kind of shaking camera image all day.

10. Castrated men live longer. Yes, there are studies. Having a penis shortens human life. This is also the reason why women tend to live longer.