Kylie Jenner and Kourtney Kardashian Work Up Sweat, Hormones of Men Everywhere

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What's the point in going to the gym if you can't tell everyone about it.

Isn't that right, Kylie Jenner and Kourtney Kardashian?

Kylie Jenner and Kourtney Kardashian in the Gym

The half-sisters worked up far more than just a sweat over the weekend, rocking some revealing clothing and working up the hormones of millions of men around the globe via a pair of exercise selfies.

"First workout with @kourtneykardash this lady has been working hard!" Kylie wrote as a caption to the image above, while Kourtney added of the picture below:

"I've been trying to get her to workout with me for six was my lucky day."

Work Out Sisters

Why did Kylie Jenner finally decide to work out with Kourtney Kardashian?

Perhaps because Tyga is so bad in bed that she barely burns any calories when getting it on with her boyfriend.

Kourtney, meanwhile, is allegedly having sexual intercourse with Justin Bieber and has been for months now.

That singer is 21, of course, while Kourtney is 36 years old.

So it would also stand to reason that this mother of three would be extra motivated to hit the gym and stay in shape in order to continually impress her younger man.

For these famous women, in our imagined universe, it all comes back to their men. How sad.

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Kourtney Kardashian Biography

Kourtney Kardashian Photo
Kourtney Kardashian is the least known of the older Kardashian sisters. She's probably the best looking, though. Kourtney has never made... More »
Los Angeles, California
Full Name
Kourtney Mary Kardashian