My son knows a lot of words. His name, Jump, Hat, Cat…lots of words. His favorite word is “no,” although I’m not sure he knows what it means. Whenever I say it he just laughs and laughs like it’s the most entertaining thing ever. My theory is that “no” is usually accompanied by me running for him and grabbing him to prevent him from doing whatever dangerous thing it is he’s up to. So he sees it as a precursor to getting attention.