It's that time of the month again. You know, when your period odour attracts the likes of sharks, and when you have sleep on your side every few hours to avoid bloody leaks.

Period myths like these have been around for as long as we can remember and from the absurd ones (if you wear a tampon in the pool, it will swell up and drown you) to the ones we can almost believe, these myths tend to misinform and misguide women about menstruation.

Periods, for the most part, occur every 21 to 35 days and last about two to seven days. Between periods, a woman's ovaries release an egg (a process called ovulation), and at the same time, hormonal changes prepare our bodies for a potential pregnancy. If ovulation occurs and the egg isn't fertilized, voila, you get your period, according to the Mayo Clinic.

And while we've heard all sorts of strange nicknames like Aunt Flo and Leak Week for our menstruation cycles, the folks over at Playtex Sport Fresh Balance say myths can lead to a lot of confusion about understanding your flow. And understanding your body means getting to know the facts.

Check out Playtex's top 10 myths about periods people still believe: Which ones have you heard? Did we miss any? Let us know in the comments below:

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  • MYTH: Don't exercise when you are on your period

    <strong>TRUTH:</strong> Run, bike, dance — do whatever you want. These are just some of the so-called "strenuous" activities you can still do while you're on your period. Unless you're in a lot of pain, feel free to exercise or partake in any other type of activity. In fact, some <a href="" target="_blank">studies even suggest exercising can help with painful periods.</a>

  • MYTH: Don't go swimming

    <strong>TRUTH:</strong> There was a time when young girls were told strange things like if they went swimming in the ocean, their period scents would attract sharks, or their tampon would swell with water, causing them to drown. These are pure myths. Tampons, for example, make it easier for women to enjoy swimming or beach days during periods.

  • MYTH: People can tell when you're on your period

    <strong>TRUTH:</strong> Unless you're carrying a big red sign that says "it's my time of the month," nobody will know you're on your period. If you're embarrassed about pad lines (even though you can hardly tell), try wearing a tampon. Sometimes, you may also have a period odour. Again, nobody else can smell it. If you are worried, change your tampon or pad more often.

  • MYTH: Teens shouldn't use tampons

    <strong>TRUTH:</strong> Tampons are perfectly safe for both teens and adults. If you still haven't used a tampon and you're worried about discomfort, make sure you read the instructions carefully. And no, using tampons doesn't mean you lose your virginity.

  • MYTH: During your period, you lose a lot of blood

    <strong>TRUTH:</strong> For the first few hours/days of your period, it may seem like you’re losing a lot blood. On average, women lose about 60 ml (4 tablespoons) of blood, and considering a teen who weighs 110 lbs has about 3,500 ml of blood in her body, you can see the loss isn't that big.

  • MYTH: A tampon can float away inside your body

    <strong>TRUTH:</strong> No. Just no. There is no way a tampon can "float" away inside your body. Once you insert a tampon, it will stay there until you have to take it out.

  • MYTH: Don't wear tampons overnight

    <strong>TRUTH:</strong> You CAN wear a tampon overnight. Most tampons can be worn for eight hours a day or night, keeping in mind you should change your tampon every four to eight hours.

  • MYTH: During your period, only sleep on your side

    <strong>TRUTH:</strong> Again, false. Sleep on your back, front, side, whatever makes you feel comfortable. If you're worried about leaks, try pads and tampons that are meant to be worn overnight.

  • MYTH: PMS is not real

    <strong>TRUTH:</strong> PMS (premenstrual syndrome) can occur seven to 14 days before the period begins. During this time, women may experience acne, bloating, tender breasts/nipples or mood swings. Some studies have <a href="" target="_blank">shown mood swings, for example, may not exist, but this again varies from woman to woman. </a>

  • MYTH: Inserting a tampon hurts

    <strong>TRUTH:</strong> The key to using tampons is to relax. If you don't get it right the first time, don't worry. Practice makes perfect, even when it comes to tampons.

  • NEXT: Worst Nicknames For Periods

  • <strong>What it sounds like:</strong> A really bad horror film about a group of teens who drive their car out into the woods and get haunted by a ghost. <br> <strong>But what you're actually referencing:</strong> There are cramps, and yes, blood to deal with, but getting your period isn't a curse of any sort — it's part of being a woman of a certain age. Periods involve our <a href="" target="_blank">ovaries releasing eggs, while hormonal changes prepare our uteruses for pregnancy</a>. See ... not so scary.

  • <strong>What it sounds like:</strong> A really cool and urban aunt who likes to listen to hip hop and buy vinyl records <br> <strong>But what you're actually referencing:</strong> Aunt Flo only visits once a month (a 28-day cycle to be exact). She is kind of uncomfortable, annoying and her conversations never stops flowing...

  • <strong>What it sounds like:</strong> Your really really really old aunt who has a kind soul. <br> <strong>But what you're actually referencing:</strong> Similar to her sister Aunt Flo, Aunt Rose seems to be the nicer of the two: Because we all know things like rose petals and rose bushes resemble menstruation.

  • <strong>What it sounds like:</strong> Like you have a giant wound and you can't stop bleeding. Ever. <br> <strong>But what you're actually referencing:</strong> You're being pretty literal here, but yes, a period means you're bleeding from your vagina.

  • <strong>What it sounds like:</strong> A really trendy urban cafe. <br> <strong>But what you're actually referencing:</strong> The dot/dots that appear on your liner, pad and sometimes on your bed sheets and underwear. Also, dot = period.

  • <strong>What it sounds like:</strong> Not just any friend, but a really annoying friend you don't like. <br> <strong>But what you're actually referencing:</strong> Sometimes we try to make the best of what life throws at us by staying positive and remembering our periods can be our friends.

  • <strong>What it sounds like:</strong> When the plumbing went wrong ... for a week. <br> <strong>But what you're actually referencing:</strong> Again, the leak refers the constant flow of blood coming out of your body. We also assume people are referring to leaks they get on their pants or bedsheets. The worst.

  • <strong>What it sounds like:</strong> Time of the month sounds like a hush-hush thing that happens to your body that only you and members of a secret club understand. <br> <strong>But what you're actually referencing:</strong> TOTM refers to time of the month when your period is taking place — just so we're all on the same page.

  • <strong>What it sounds like:</strong> A newsletter or a magazine that comes out once a month <br> <strong>But what you're actually referencing:</strong> To add emphasis that everything is cool with your flow and your period only happens once a month.

  • <strong>What it sounds like:</strong> Teenage slang <br> <strong>But what you're actually referencing:</strong> PMS actually stands for premenstrual syndrome, and isn't a synonym for your period at all.

  • <strong>What it sounds like:</strong> A dirty old cloth you use to wash your dishes and floor <br> <strong>But what you're actually referencing:</strong> The rag is closely related to the pad or tampon we wear during periods... and how uncomfortable it is. It's also an unfortunate visual.

  • <strong>What it sounds like:</strong> <a href="" target="_blank">This river in China!</a> <br> <strong>But what you're actually referencing:</strong> We're not sure with the obsession of words like "river," "water" or "flow" when it comes to describing your period. Our best guess? The assumption that when a woman is on her period, she is forever bleeding.

  • <strong>What it sounds like:</strong> It sounds like what it is, <a href="" target="_blank">the bleeding elevator from the 'The Shining.'</a> <br> <strong>But what you're actually referencing:</strong> Periods are scary and women bleed and if you see/talk about this blood, something terrible will happen. Get a grip, people — the only thing frightening about periods is using phrases like "the shining" to describe it.

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