When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
Your wounds heal faster if you lick them, you instinctively do this for that reason. Tears help, too.
20
You mostly breathe from only one nostril at a time!
75
The average sperm cell swims at 8 inches per hour.
76
Wearing headphones for an hour increases the bacteria in your ear 700 times.
233
The smallest human penis ever recorded was just 5/8 of an inch long!
77
Putting sugar on a wound or cut will greatly reduce pain and speed up the healing process.
25
Tap water in Canada is held to a higher health standard than bottled water.
19