Why can't a person tickle himself?
We found that both these regions are less active during self-tickling than they are during tickling performed by someone else, which helps to explains why it doesn't feel tickly and pleasant when you tickle yourself.

žetta er ekki gagnlegt svar... svipaš og ..af hverju borša kettir fisk?
žvķ męlingar hafa sżnt fram į aš munnurinn į köttunum tyggur fiskinn.