But straight men, they do a little different.

Hey everybody, thanks for watching Dnews today. I am Trace.

Evolutionary psychology is kind of weird.

It's a bunch of highly-educated scientists looking at modern humans and applying Darwin's evolutionary principles to behaviors they observe throughout human history.

While there is research involved, it's kind of like educated guessing.

We can't go back in time to see exactly what prompted the adaptation resulted in something like jealousy.

But evolutionary psychologists can test how it work and guess.

For the people who've never experienced jealousy, to which I personally say, "what?"

Jealousy has its roots in envy, suspicion, mistrust, anxiety and protective possession.

It's usually attributed to relationships, and feels like a burning all encompassing emotive mess.

Evolutionary psychologists say this feeling has been part of humanity for like a million years, evolving when humans were still living solely in Africa.

Males were constantly guarding the social group and providing food while the females were maintaining social structure and raising offspring.

According to their hypothesis, male jealousy evolved to ensure that the females weren't taking resources and giving them to mates who weren't prioritizing their genes.

i.e. females who were thirsty for a side piece.

On the other hand, female jealousy, though originated from the same inner structures, manifested as anxiety over emotional betrayal.

Because her mate might take those hunting spoils and go split with his side piece.

That means fewer resources for her and her offspring.

Jealousy burns hotly in both men and women, but the cause is a little different.

It all sounds kind of twin-drama like, right? And yet studies over the years have confirmed both male and female jealousy do work in this way.

Now, a new study in the Archives of Sexual Behavior, the largest ever completed, claims they've confirmed yet again how jealousy works.

In this giant study of 64,000 Americans, they found that when it comes to sexual infidelity, straight men are the most heated.

Heterosexual men cannot abide when their partner has physical relations with another.

That being said, straight women, gay, lesbian, and bisexual men and women were all more concerned about emotional infidelity, or the idea that their partner might love someone else.

The lead researcher wanted to learn what the largest triggers of jealousy might be, and for whom those triggers are strongest.

And it turns out, only heterosexual men are not worried about their partner falling in love with another person.

They are more concerned with physical intimacy.

Of course, it also depends on how you ask participants the questions in studies like this.

An older study out of Northeastern found when presented with seven different types of infidelity,

rather than simply emotional or physical, the differences shrank between the sexes.

What about you? What would send you into a jealousy rage?

Go down into the comments and let us know what sent you off and make sure you subscribe for more Dnews.

Also, check out these other videos down here about the science of attraction. Thanks for watching.