These days there are various types of challenges that are strangely going viral over the social media. I believe it started with the "Ice Bucket" Challenge which then was the trend a couple of years ago and the most recent example was the "Mannequin Challenge" just a couple of months ago.
In this particular challenge, a pair will be participating with of them is blinded. Now beyond that, the one blindfolded will be assisted by his/her partner to touch various parts of their body and guess where they were touched.
Below is a demonstration on how this new trend is done.