Question

why don't we laugh when we tickle ourself ??​

Answer 1

Answer:

because our mind know that we are not funny -_-

Answer 2

Tickling yourself is nearly impossible, because your cerebellum (at the back of your brain) governs your movement and can predict when you're about to tickle yourself. You can, however, simulate a light tickle (called knismesis) rather than the full-on laughter-inducing heavy tickle (the gargalesis).

Hope it's helpful. ♥✌