Weird but cool

*eyes narrow*

Where's his nails?????

I heard that this was a myth...is this true? (It being a myth)

"caused by the brain"
What?

There has been no firm evidence to support this and should not be considered fact. Instead after the initial study hit the news there have been several other research studies on just this topic and the scientists, in the more recent and in depth study, determined, on average, there was no difference between wrinkled vs unwrinkled.
http://www.sciencemag.org/news/2014/01/scienceshot-wrinkly-fingers-may-not-give-you-better-grip
http://io9.gizmodo.com/nope-pruny-fingers-and-toes-dont-give-you-a-better-g-1498866921