Stop holding yourself and your partner to unrealistic standards and get back to enjoying sex. Here are three enduring myths that are probably making you fret about nothing.

Finding clear, definitive facts about healthy exercise can be difficult. The exercise industry is a multi-billion dollar business, built partially on selling gadgets and supplements to people desperate to lose weight or look attractive. Meanwhile, good workout plans and simple truths lurk in the background waiting for their time to shine. All of this results in lots of misinformation about exercise. We're taking some of those commonly-held exercise myths to task, and we have science to back us up. Let's get started.

However long you've been alive, chances are you've heard a completely incorrect "fact" about the brain. The human brain is notoriously complicated, and despite many advances in modern science, much of the organ remains a mystery.

That's probably why, when someone hears a rumour about how the brain functions, they spread it - regardless of whether or not it's true.

Movies are great at telling stories, but they're horrible at teaching basic survival skills. Here are five of the ways they've led us astray - from performing CPR to battling wild animals.

Ever since you learnt what was between your legs, you probably had questions. Those questions inevitably lead to answers. It's likely not all of those answers are grounded in actual fact. Now it's time to bust all those myths you've heard about the birds and the bees - with science!

Hair grows back thicker when you shave it! Reading in dim light turns you blind! Peeing on a jellyfish sting will soothe the pain! The way our bodies work is a bit of a mystery, and our desire to unlock its secrets has led to a vast amount of misinformation. Many of these false notions are more widely believed than the truth. We took our healthy scepticism and a bunch of research to find the truth behind some of the most common myths about our bodies and our health. Here's what we learned.

Some computer security myths and stories that keep getting passed around, even though they're clearly not true. We sat down with computer security experts to separate fact from fiction.

Magpie season is currently in full swing (or should that be swoop?) with dozens of parks and playgrounds descending into avian war zones. But just because something is scary doesn't mean you should believe everything you hear. Here are five bogus magpie myths that the nation needs to debunk.

Is milk really good for your bones? Are all salty snacks unhealthy? Do you need to drink two litres of water per day? These are just some scientific food "facts" that aren't as concrete as you might think. We talked to a group of nutritionists and asked them to share the food myths they find most irritating and explain why people cling to them. Here's what they said.

Sleep is a mysterious process, and that means it's the subject of many untruths and much ill-informed wishful thinking. If you're trying to improve your quality or quantity of sleep, don't fall for these myths and you'll be well on the way.

There's a lot of bad advice, bad science, and bad logic out there -- and I'm sorry to report that some of it is probably coming from people you trust. Sharpen your pencils and take a seat -- Bullshit Resistance School is in session.

Apple cider vinegar has been a multipurpose folk remedy for decades, touted as a disinfectant, a natural way to replenish skin and hair, and a superfood with all kinds of benefits. Science has backed a few of these purposes, for vinegar in general, but the observable results are pretty meh.

Food contains energy. Exercise requires energy. We feel great when we're full of energy. But are we talking about the same thing in all three sentences? We aren't, so let's clear up the confusion.

You're standing on a beach fully clothed, enjoying a nice barbecue when you see someone in the nearby lake flailing. Naturally you spring into action. If you jumped into the water fully clothed, though, you're about to make it a lot harder to save that drowning person - or even yourself.

Somebody once said you shouldn't order fish on Mondays because there are no seafood deliveries on weekends. That person was none other than renowned US chef Anthony Bourdain. He's now back to explain why that isn't something you need to worry about anymore.

American cheese has a bad reputation, especially among foodies and health-conscious folks. (Think the bright yellow stuff at McDonald's.) You might hear claims that it's made of "plastic" or "chemicals," but it turns out the truth is nothing scary. American-style cheese is just cheese mixed with melting salts and ordinary ingredients like milk.

Feeling sick and unhealthy? It's because you eat too many acidic foods that make your body equally acidic and harm your health. Eat more alkaline (opposite of acidic) foods to heal your body! But if our blood pH fluctuated that easily, we'd all be in serious trouble.

Cooking a chicken until its "juices run clear when pricked" is pretty standard poultry advice. However, according to Cook's Illustrated, it's not a very dependable way to tell if your chicken is properly cooked.

Let's start with a quiz: How many senses do you have? Which of the following are magnetic: a tomato, you, paperclips? What are the primary colours of pigments and paints? What region of the tongue is responsible for sensing bitter tastes? What are the states of matter?