R U Serious???

Don't you hate it when people think you're stupid or something like you're not smart enough to add 2 and 2 together to get 4? People swear I'm stupid I swear and it gets more and more annoying everyday. They lie to you, talk behind your back then smile up in your face. I just don't get it why do they think you're that stupid to just swallow what they say. Somebody tell me please cuz I just don't get it personally.