Lol Awesome thread. xD My thinking is that since toes are at the front of the foot, which is all over very ticklish/sensitive, it gives us a chance to back off if we step on something sharp, hot, or particularly cold. Our feet are pretty important, after all. As for why we get ticklish at all (as in, laugh hysterically hah), that's well beyond what I could come up with... maybe nature/creator trolling us.