Making words lose their meaning when you repeat them too many times.
Making it harder to spot your own typos.
Helping you remember things that didn't actually happen.
Making you believe horoscopes are specifically about you.
Getting songs stuck in your head.
Making you see, hear, smell, and taste things that aren't there.
Letting the colour of food and drink affect how it tastes.
Making you feel actual pain when you see other people get hurt.
Ignoring information it thinks doesn't matter to you.
Looking for patterns where none exist.
Making you think others' ideas are your own.