(Women's) Laughter Is the Best Medicine

Science concluded a long time ago (circa 1974) that laughter is contagious. Now we know that women are the best at spreading the joy around. Study participants listened to around 50 audio clips of various types of laughter, such as open- versus closed-mouthed chuckles, and rated the female belly laugh as the most pleasurable.

10 Signs You're Not Happy

Snapping at your best friend and zoning out in front of the TV for hours might be more than a case of the Mondays. If you can't sleep and you're consumed by stress, you might be unhappy.

Keeping Up With the Joneses' Sex Lives

Do you know how often your friends and neighbors are having sex? If you're having sex frequently, finding out those intimate details could translate to a happiness boost, says a new study out of the University of Colorado at Boulder. Sort of...

Could semen serve as an anti-depressant in some women? A study found that women who never used condoms rated themselves as happier than women who used condoms. But could there be any merit to the research? Tune in to learn more.

The Great Sex Frequency Divide

Depressing bedroom news alert! Confirming our worst fears about how the romance slowly fizzles as relationships plod past the seven-year itch and beyond, a new study from Australia finds that a lot of people in long-term heterosexual relationships are unsatisfied with their sex lives (via NYT).

What Difference Does Marriage Make?

Many, many episodes ago on Stuff Mom Never Told You, I jokingly commented to Molly that we should abolish marriage. We had been discussing the legal differences between civil unions and marriages, and after dissecting the legalese ad nauseum, I mentioned that maybe we should just do away with the whole thing. Let folks couple up as they will, and call it a day.

Multiple studies indicate that people with sisters seem to be happier than people with brothers -- but what does this mean, and could it be true? Join Molly and Cristen as they explore the relationship between your siblings' gender and your happiness.

An objective measure of happiness is difficult to come by, but researchers say there are definite trends. Sometimes men are happier, and sometimes women are. Explore the science of happiness in this podcast from HowStuffWorks.com.