This post made me laugh. I seem to always have one like this...usually my own kids My 2.5 year old daughter will ask and ask and ask... "because why mom? because why?".."Why's he doing that? why's she looking like that? Why did you do that? What did you say? Why'd you say that?" LOL. I have another 3 year old who has started the why's too...and I know her mom must often say "just because"....often when she asks, she will say "Why? Just because?" It does require patience...but it is a normal stage. I answer if it something I can answer, or if I know they know the answer, I turn it around and ask them back "Why do you think?"....they can often answer perfectly