That's interesting, I thought it would've been the other way around, given that caffeine can make you jittery. Parkinson's is associated with a loss of dopamine producing cells, so maybe caffeine helps to stimulate those cells in some way.

It's really just a reverse beer belly if you think about it.

not surprising, people have their phones on them much more often than their computers. Personally I browse reddit from my phone 95% of the time, only using desktop for the odd moderating duty.