When I was pregnant with my 3rd child (he's 19 months now), I used to love the taste of chalk. Yes, like the chalk on a chalk board at school. While taking some courses at the local college, I'd imagine myself licking the chalk board after the professor erased the board...sometimes I couldn't even concentrate on class discussions. WTF was I thinking? I even went out and bought some chalk from WalMart to lick before going to bed. My two older kiddos, DH, friends, family....everyone...thought I was crazy. I was just craving!!