The internet’s latest viral offering, the Bellybutton Challenge, has left us feeling colder than any Ice Bucket ever did. Starting on China’s version of Facebook, Weibo, the #bellybuttonchallenge involves wrapping your arm around your waist to see if you can touch your bellybutton from the opposite side.

Why? Well, an unknown US study claims that women who CAN touch their bellybutton in this manner have “good bodies”, while those who can’t need to lose weight.

Meanwhile, we’re pretty sure it all comes down to flexibility and the length of your arms, and doesn’t prove a darn thing about your health or your weight.

This guy felt the same, though he later admitted the arm actually belonged to his friend, which made us sad and amused all at the same time.

Now, if you’ll excuse us, we’re off to eat some cake.