1. A man's testicles are typically uneven, with the left testicle higher than the right in over 85% of cases. (Men can check this themselves.)
[While other male mammals have testicles at the same height.]

4. Ninety-nine percent of people cannot lick their elbows with their tongues.
[Don't believe it? Try it!]

5. Scrubbing your skin repeatedly in the shower may make it darker. Long-term, repetitive mechanical stimulation of the skin can lead to "friction melanosis," causing the skin to darken.
[Therefore, ladies who care about their appearance should be careful; be gentle with your skin. Vigorous scrubbing doesn't mean it's clean.]

7. The activation code for US nuclear weapons is eight zeros.
[For 20 years after 1962, the activation code for the nuclear weapons the US used to destroy the Earth was eight zeros. Furthermore, to avoid entering the code incorrectly, the Americans even locked all other numbers on the control panel; only the zeros could be pressed.]

8. Do you try to lick your elbow with your tongue?

9. Medical insurance cards cannot be used for emergency treatment at the hospital due to suicide attempts.
[Medical insurance cards can only reimburse medical expenses incurred due to non-intentional causes or illnesses. Suicide is considered an intentional act and therefore not eligible for reimbursement.]

10. When being chased by a rabid dog, turn away, because rabid dogs don't turn.

11. Water spinach juice can be applied to moles to remove them.

12. People who like to pick their noses are smarter than those who don't, because massaging the nasal mucosa with your fingers can stimulate the brain.

13. Some male spiders in the family Araneidae have "removable" genitalia.
[To avoid being eaten by the female spider after mating, they leave their genitalia inside the female's body and then quickly escape before she recovers.]

14. The faster a man's beard grows, the stronger his sexual desire.
[The faster a man's beard grows, the faster his metabolism, and the stronger his sexual desire. Girls can test their boyfriend's libido by observing how often he shaves.]

15. Women can use "self-suggestion" to reach orgasm faster.
[A British panel of sex research experts suggests that during sexual intercourse, women who use "self-suggestion" to imagine scenes like beaches and white clouds are more likely to reach orgasm.]

17. Watching TV for more than 2 hours a day can shorten your lifespan by 1.4 years. If you watch TV for 6 hours a day, you may die 5 years earlier.

18. Human DNA and banana DNA are 50% identical.

19. Boiling water shouldn't be drunk immediately, because it will scald your mouth. [laughing emoji]

20. Eggplant contains a small amount of nicotine. The amount of nicotine in approximately 18 pounds of eggplant is equivalent to that in one cigarette.

21. Astronomers say that Saturn rains diamonds every year, about 1000 tons a year. Um, I want to go to Saturn, does anyone know how to get there?

22. When you have severe nasal congestion, you can try placing a water bottle under your armpit. The armpit contains sympathetic nerves that can constrict the blood vessels in the nostrils. Squeezing the water bottle inward can stimulate these nerves and relieve nasal congestion!

23. Pure gold is edible, and in small amounts can be consumed under certain conditions—how luxurious! However, gold jewelry used in daily life is not edible because it contains a large amount of non-edible metals.