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8 SHOCKING Facts About Your Period We Betcha Didn't Know

1. Biologically speaking, men are LESS attracted to you on your period.

Sorry to break it to you, but it's not their fault! Studies have shown that a man's testosterone levels are influenced by a woman's scent, particularly when she is ovulating (that is, when she's at her peak of fertility). Scientists Saul Miller and Jon Maner from Florida State University put this theory to the test. They asked male volunteers to sniff-test T-shirts worn by women in various stages of their menstrual cycles. The study, published in the journal Psychological Science, found that when men smelled T-shirts worn by women who were ovulating, their testosterone levels raised significantly compared to T-shirts by non-ovulating women. When asked, the men also remarked that T-shirts worn by ovulating women smelled sweeter. What does this mean? It means to book date night before or after Aunt Flo's monthly visit ... but maybe not during.

2. Your period makes you friskier than usual.

Progesterone—the hormone believed by scientists to lower your libido—is at its lowest during your time of the month. So while your first instinct might be to climb into your old college sweatpants, science actually suggests that feeling the urge to "slip into something more comfortable" (ahem, if you catch our drift) is not so strange at all.

3. Your period turns you into a shopoholic.

Credit card bills piling up suspiciously at the same time every month? Blame your ovaries. Women are more likely to splurge on a shopping spree 10 days before their periods begin. Professor Pine from the University of Hertfordshire surveyed nearly 500 women about their spending habits in correlation with their menstrual cycles. Almost two-thirds of the women studied who were in the later stages of their menstrual cycle admitted they had bought something on an impulse. The professor's explanation? Retail therapy. Women go shopping to help deal with their PMS.

4. Your period, obviously, requires A LOT of tampons.

We each have our own preference when it comes to products, but about 70 percent of all American women use tampons. It's estimated that on average, a woman will use more than 11,000 tampons in her lifetime. (Just think of how much money that adds up to in disposable cotton?!)

5. Disney even made a movie about periods.

Hmm, I don't seem to recall this one. Back in 1946, Walt Disney released a 10-minute educational film called The Story Of Menstruation. It's also believed by some to be the first use of the word "vagina" on film. Not exactly family friendly, huh? (Have we ruined your childhood yet?)

6. Your period affects the way your voice sounds.

This proves that your man is listening to you. In a study published in the journal Ethology, psychologists asked three groups of guys to listen to the voice recordings of women who counted from one to five—at four different points over their menstrual cycle. The men were then asked to guess which recordings were made while the women were on their period. After examining their answers, researchers Nathan Pipitone at Adams State College and Gordon Gallup from SUNY-Albany, found that the men were correct a significant amount of the time. "Vocal production is closely tied to our biology," Pipitone said. "Cells from the larynx and vagina are very similar and show similar hormone receptors."

7. People in The Middle Ages believed periods caused red hair.

Yep, people really did accept this as true. Redheads were thought to have been born if a woman was menstruating at the time of conception. Oh, history.

8. Periods can make you bleed from OTHER parts of your body—not just your uterus.

This idea is a little scary. The medical condition "vicarious menstruation" originally surfaced around the 1800s and referred to bleeding from a surface other than the mucous membrane of the uterine cavity that occurs at the time when normal menstruation should take place. Women have reported bleeding from their eyes, ears, mouths, lungs, noses and even skin.

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