Page 101 - Sex Facts

It's not possible to swallow your tongue.

This is a common misconception that is frequently associated people who suffer from epilepsy. It is impossible for a person to swallow their own tongue because tongues are rooted to the floor of our mouths by a segment of mucous membrane called the lingual frenulum.

Don't place an object behind the tongue to prevent someone from 'swallowing' their tongue. This only serves as a choking hazard. In reality, choking is a main risk with this sort of episode - a seizure victim should be placed on their side in order to prevent saliva or other bodily fluids from blocking their airway.
(Sources: 1, 2)

Smoking can shorten a man's penis.

The effect is similar to smoking's effect on a person's heart. The blood vessels within the penis are constricted, which allows for decreased blood flow. This lessened flow has a negative effect on the elasticity of the penis and prevents it from achieving its full length once erect. Studies have shown that over time, these effects can reduce the overall length by as much as 1 cm!

According to one researcher, smoking has more direct harmful impact on the penis than it does on the heart!
(source)

Actor Anthony Hopkins never blinked on film while playing the role of Dr. Hannibal Lecter.

Hopkins' portrayal of the cannibalistic serial killer in The Silence of the Lambs earned him the Oscar for Best Actor in 1991. Not having Dr. Lecter blink was a trait improvised by Hopkins and one of which he is also very proud. He believes that the unnerving lack of movement enabled him to keep the audience mesmerized.

Amazingly, Hopkins was only onscreen for a total of 16 minutes - which was the shortest Best Actor performance at that point!
(Sources: 1, 2, 3)

Lady Gaga taught herself to play piano by ear at the age of four.

Prodigious young Stefani Germanotta (her actual name) had already written her first piano ballad had already written her first piano ballad by the age of 13. The following year, she was performing at open mike nights in NYC clubs.

At 17, Germanotta's musical talents enabled her to be one of only 20 students accepted to the Tisch School of Arts at New York University. Less than 3 years later, a major record label signed her as a professional songwriter, setting her up for the pop success that she continues to experience today.
(source)

Katy Perry was originally a Christian rock artist by the name of Katy Hudson.

If you want further proof, check out her debut album, Katy Hudson. When she made the jump from Christian rock to mainstream pop, Katy decided her given name was too similar to that of actress Kate Hudson. In order not to be confused, she changed her last name to Perry, her mother's maiden name.
(source)