Since guys are usually down for sex anytime, anywhere, something's probably up when your man's suddenly not up for naughty time. Sure, stress or relationship issues can kill his sex drive, but research has found these random things affect his libido, too.
By Natasha Burton
1. Neon-Colored Drinks
Animal testing has shown that brominated vegetable oil, a common ingredient in both citrus-flavored flavored sodas and electrolyte-replenishing drinks can cause testicular damage. Bromine has also been connected with impotence and low sex drive in men. So if your guy is a fan, it might be time to get him to cut back.
In a study published by the New England Journal of Medicine, researchers found that men's testosterone levels dropped dramatically when they were given licorice supplements to eat. Random, right?
Related: How to Kiss Him All Over
3. Forgetting to Floss
Not only does flossing keep your choppers healthy, according to the Journal of Periodontology, men who don't regularly floss their teeth have a higher chance of erectile dysfunction than men who do.
4. Touching Receipts
Okay, this is a bit of a weird one. But a study published in the journal Fertility and Sterility discovered that men with higher levels of the chemical bisphenol A (also know as BPA)-which coats about 40 percent of receipts-in their urine had lower sperm counts than men who has lower levels of BPA in their systems. BPA has also been linked to erectile dysfunction and lower levels of sexual desire in men.
Related: 9 Tips for Steamy Shower Sex
Ladies with vegetarian boyfriends, take note: Soy has also been known to trigger feminizing qualities in men, like breast growth and high estrogen levels, as well as decrease men's horniness and erection size.
6. Scented Candles
While we're all about setting the mood, using certain candles may have the opposite effect-and totally kill a man's libido. In 2008, South Carolina State University conducted an air-quality test on artificially scented candles and found that some of them emit a ton of icky substances into the air, including benzene and toluene, a.k.a. the toxic components in tailpipe exhaust.
Related: How to Sneak Sex When You're Home for the Holidays
7. Cold Medicine
While it takes a strong guy to want to get busy while he's battling "man flu" there may be another reason your guy might be ho-hum about sex when he's feeling under the weather. Over-the-counter cold and flu remedies that contain the chemicals diphenhydramine or pseudoephedrine can have not-so-sexy side effects, including low sex drive and erectile dysfunction.
8. Gin & Tonics
Your guy's go-to cocktail may be killing his mojo: According to Germany's Institute of Reproductive Medicine, quinine-the flavoring agent used in tonic water-can cause erectile dysfunction. Other studies in Nigeria show that quinine can also decrease man's testosterone levels. Yeah, maybe it's time to switch to soda water.
Read more at Cosmopolitan.com!
Words That Give a Liar Away
10 Signs He Wants to Marry You
30 Things to Do With a Naked Man
Ballsy Moves That Impress Guys
Become a fan of Cosmo on Facebook and follow us on Twitter!
Want More Sex & Love Advice? Subscribe to Cosmo & Save Up to 77%!