We all know a person whose boasted about the length of time they've abstained from showering or bathing.

It's either an odd point of pride or a self-deprecating knock on their personal hygiene.

Either way, if they kept it up — say, for an entire year — they'd smell awful, would run the risk of infection and could be covered in acne and bumps.

Keeping it au naturel for that long is, besides a slow way to alienate yourself, not recommended, advises Dr. Cameron Rokhsar, an associate clinical professor of dermatology at Mt. Sinai Medical Center in New York.

Here's what would happen: