AsapSCIENCE takes a look at the “hard” facts to reveal the mechanisms behind — and reasons for — this phenomenon.
Previously from AsapSCIENCE: The Science of Orgasms
ASAPSCIENCE, ERECTIONS, SCIENCE, SEX, SLEEP
A man somehow manages to ram his scooter into several vehicles -- and that's only the beginning.
Dmitry Arsenyev completes 15 consecutive backflips on a pogo stick, setting a new world record.
This is one of the coolest trick shots you'll ever see.
A would-be robber snatches a woman's phone, only to be instantly struck by a bus.
This is, by far, the funniest pommel horse routine you'll ever watch.
Miguel attempts to jump from one stage to another, and it doesn't go very well.
A compilation of Principal Skinner's grim Vietnam flashbacks.
America's national anthem is hard to sing when you don't know the words.
Mitchie Brusco makes history by landing the first 1080 in X Games MegaRamp history.
If you're looking for a handbag that rises above the rest, Hermes has what you're looking for.
Here's the most calm and polite way to foil a dramatic hit-and-run.
Jen has incredible range of motion in her hip as a result of the bone cancer she had at a young age.
The only medication that relieves the stress of attending spectacular gay summer weddings.
Bill Hader closes out his eight-year run on SNL with one last Stefon appearance.
Here's the very first trailer for the long-awaited 'Anchorman' sequel.
Jimmy Kimmel bleeps and blurs things, whether they need it or not.
This dog is really, really into bridal fashion.
A French student holding a "Free Kisses" sign gets more than he bargained for.