Re: The ticklingreflex: wht´s it´s evolutionary value, + You CAN tickle yoursel

The tickling sensation is felt in the cerebral cortex. And when you tickle 
yourself, the cerebellum  dampens this perception, perhaps by  telling the 
body to ignore the signal, since it knows that this is a stimulus created 
yourself, and that you are going to tickle yourself.
Darwin was the first to point out that a tickling victim squirms and 
strains to withdraw the tickled part, to get away from attacks on 
vulnerable areas such as the soles of the feet, armpits, belly and flank. 
If a fly settles on a horse's belly, the horse ripples his skin muscles as 
a tickled child squirms. This goes to show that the mechanism once 
protected us against predators by distinguishing between stimuli that were 
created ourselves and those generated externally.
So, even while walking, the pressure exerted on our soles or the tickling 
felt, is ignored for more important signals, such as to let you know that 
you have stubbed your toe or something is crawling up your leg.