But WHY!!!

Caleb's been quite obsessed with "matching" (rhyming) words lately. It all started a few weeks ago when I sent Doug and Caleb out to get me a blizzard from Dairy Queen (half price blizzards = pregnant woman heaven). While they were waiting in the drive thru line, Caleb all of a sudden exclaimed: "Hey! Blizzard and Lizard! (which sounds more like wizard coming from him) They MATCH!" Ever since then, he wants to come up with matching words with me. Sometimes he gets a bit cheeky and asks me if two very unalike words match... and when I say the don't match, what does he ask? "But why?" Hundreds of times a day I struggle to answer that question-- if I don't provide an adequate answer I often have a frustrated 2 year old on my hands. So last night as we were driving Caleb asks, "House and dirty... do they match Mommy?" Nope, they don't match. But why? he asks. Struggling to find a decent response that will avoid him getting frustrated with me I finally say, "Caleb, those words don't sound the same and they are two different kinds of words-- one is a noun and the other is an adjective." The car is quiet. After a long moment of silence Caleb says, "That was a really good answer Mommy."