To look after our health and hygiene is something we're told from an early age. We should wash our hands, our faces, and shampoo our hair, otherwise we could get dirty and sick. But, some people claim that our insistence on cleanliness is unnecessary, and that it's only by exposing ourselves to germs that we can grow immune to them. So, what would happen if you never washed at all? Ever? In your life? In this video, we take a look... If you're watching in smell-o-vision, beware.

If every April Fools’ Day you’re looking for good pranks to play on friends and family, learn from the people who pulled off the most epic practical jokes in history. Whether it was the BBC convincing viewers that spaghetti grows on trees in the Spaghetti-Tree Hoax, Burger King inventing a left-handed Whopper, or the Alaska prankster who made it seem like the volcano Mount Edgecumbe was erupting, these are some of the funniest pranks that will make you die of laughter. WatchMojo counts down ten of the greatest pranks ever pulled – whether they were April Fools’ pranks or not.

There are certain smells everyone loves. Who doesn’t love the aroma of freshly cut grass, warm laundry or fresh flowers? What’s YOUR favorite smell? WatchMojo reminds you of ten of the best smells in the world (that aren’t food). You’ll WISH you had smell-o-vision.

There are some foods everyone loves to smell. Freshly-popped popcorn, freshly-basked bread, cookies right out of the oven, sizzling turkey, fresh-brewed coffee… Hungry yet? What’s YOUR favorite food smell? WatchMojo reminds you of ten of ten food smells everyone loves. You’ll WISH you had smell-o-vision. And cookies. And bacon.