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Why Does Sex Make Men Sleepy?

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iStockPhoto

Alfred Kinsey, biologist, pioneering sex researcher and founder of the Institute for Sex Research at Indiana University*, once wrote that "a marked quiescence of the total body is the most widely recognized outcome of orgasm," more noticeably among males. Why is that?

Let's get the obvious reasons out of the way first. Sex often, though not always, happens at night in a bed and is physically exhausting. If you're tired to begin with, all that physical exertion only adds to it, and since you're already in bed, it's only natural to be sleepy. Compounding this is the fact that sex dominates your attention when you're having it (and sometimes when you're not), so you don't pay attention to your breathing and wind up breathing shallowly and holding your breath pretty often. These aren't really the sorts of things you want to do during vigorous exercise, as they lead to oxygen deprivation and—all together now—sleepiness.

There's also the biochemistry of the orgasm to consider.

After sex, a man's brain releases a slew of hormones and neurotransmitters. Some of them, like prolactin, oxytocin and vasopressin, have been linked to sleep as well as sex. Prolactin plays a role in sexual satisfaction by counteracting the effects of dopamine** (which is responsible for sexual arousal). It's also been shown that the artificial delaying of an REM sleep period disrupts the rhythm of prolactin release, and that REM sleep is reduced in mice with prolactin deficiencies. Oxytocin and vasopressin have also both been implicated in the body's regulation of sleep cycles. While none of these chemicals are fully understood and their links to sleep aren't concrete, the circumstantial evidence suggests that they may play a part in pulling you off to a post-coital snooze.

What About the Ladies?

The phenomena of men falling asleep soon after sex is a little more well established than women doing the same—at least in that people notice it enough to make jokes about it on sitcoms, and write in to mental_floss asking about it. While I haven't been able to find any science-backed evidence that post-sex sleepiness definitively affects men more than women, there are a few hypotheses floating around as to why it seems that way. In their 2006 book Why Do Men Fall Asleep After Sex?, Mark Leyner and Billy Goldberg, M.D. suggest that exertion during sex depletes the muscles of energy-producing glycogen. Because men usually have more muscle mass, they get more tired. And it's entirely possible that women get just as sleepy, just as fast as men do after orgasm, but women simply have orgasms during sex less often than men do.

*Kinsey left his mark on a different field earlier in his career: entomology. He did his doctoral thesis on gall wasps and researched and published papers about them at the American Museum of Natural History in New York. Of the 18 million+ insects in the museum's collections, about 5 million are gall wasps that Kinsey collected. In return for his collection, Kinsey received $400 and a lifetime membership to the Museum.

**The hormone may also mediate the "sexual refractory period," or the recovery phase after an orgasm during which a man cannot have additional orgasms or achieve an erection.

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The Hidden Benefits of Your Health Insurance Plan
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iStock

When we talk about health insurance, it’s usually in the context of a complaint. While it’s true that insurance companies often fight tooth and nail to keep their financial exposure limited, they’re also making moves to offer benefits beyond standard health care—and you might not even know about these perks.

A prime example is the recent trend for companies to offer a discount savings card on groceries. United Healthcare, Humana, and Medica are just a few of the insurers who have issued cards that can be used for an instant price reduction when checking out at participating stores. The catch? The programs typically cover healthy or organic foods. Along with discounted gym memberships, the benefit is an effort to keep policy holders fit and—at least theoretically—to reduce the need for medical interventions.

If you’re surprised to hear about it, you’re not alone. Here are some other programs offered by the nation's largest insurance companies that you might be missing out on. (Bear in mind that each company has various tiers of coverage and not all perks may apply to all levels.)

UNITED HEALTHCARE

The company’s Healthy Savings program for groceries allows shoppers to save on select items that change on a weekly basis. Each Sunday, the cards will recognize between $40 and $50 in deals on healthier grocery options. It’s only good at participating retailers, including Shop ‘n’ Save, Giant, and others. You can search for locations on their website.

Through UnitedHealth Allies, the company also offers discounts on weight loss programs like NutriSystem and Jenny Craig, as well as gym memberships and even active footwear [PDF].

CIGNA

The Northeast-based insurance company provides an umbrella discount service, Healthy Rewards, that offers savings on eye exams and up to 25 percent off alternative health therapies like acupuncture, chiropractic, and massage appointments [PDF]. They also offer fitness membership discounts. More information can be found at MyCigna.com.

AETNA

It’s hard to know what the pending acquisition of Aetna by pharmacy giant CVS will mean for health care perks moving forward. Currently, the company offers discounted memberships and trial passes to more than 10,000 gyms nationally, as well as discounts on home fitness equipment like treadmills [PDF]. You can also find discounts on meal home delivery subscriptions. Logged-in members can go to the Aetna website and select “Health Programs” then “Discounts” to determine your eligibility.

ANTHEM BLUECROSS

In addition to savings on groceries, gym memberships, and weight loss programs, Anthem BlueCross offers savings for members on DNA ancestry kits, pet insurance, and even baby-proofing.

HUMANA

Humana offers an impressive array of “lifestyle discounts” that range from basic wellness perks to teeth whitening, identity theft services, and 15 percent off in-network LASIK procedures. They also offer discounts on over-the-counter medications like Claritin and Advil. You can register at MyHumana.com to find out more.

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Bose
Bose's New 'Sleepbuds' Are Designed to Help You Doze Off Faster
Bose
Bose

If you’re the kind of person who can’t fall asleep without the whir of a fan or some other ambient noise in the background, then Bose has a product for you. As spotted by The Verge, the audio equipment company’s new wireless noise-masking Sleepbuds are designed to fit comfortably into your ears and help you doze off faster.

The Bose sleepbuds
Bose

Unlike other Bose earbuds—and, well, most headphones in general—the Sleepbuds don’t actually play music or allow audio to be streamed from external devices. Instead, they come equipped with 10 soothing audio tracks, including brown noise, rain, ocean waves, a running stream, and more.

The earbuds aren’t noise-canceling, but their audio tracks are specifically engineered to mask certain outside sounds like traffic and, perhaps most impressively, your partner’s snoring. The rechargeable battery lasts for 16 hours, and at just 1 centimeter in width and height, they’re Bose’s tiniest product yet.

For early risers whose partners like to sleep in, the Bose Sleep app can sound off an alarm in your ear that only you can hear. The app can also be used to adjust your sleep settings, including your noise of choice, volume levels, and how long you want the sound to play for.

Bose spent a couple of years developing the product and raised over $450,000 in an Indiegogo campaign to help improve the Sleepbuds by getting backers to test them out and provide feedback. The Sleepbuds are now available for purchase on Amazon for $249.

[h/t The Verge]

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