The situation in my family is pretty much the same as yours. My mom cooked every day, my dad cooked on special occasions only. Now that they live alone, they share the duty :) almost equally (and they really don't cook so often - once or twice a week maybe).

As for me... I really wasn't interested :) There was always someone to cook for me and I (maybe subconsciously) wanted to postpone this drudgery as long as I can. Then, I moved out with my boyfriend. He's an ex-cook, and his current job gives him enough spare time to cook every other week. But then, there were the weeks when he couldn't cook and I still wanted a tasty, warm, cooked dinner. So, I started learning. And I got interested. And (according to my boyfriend) I'm getting really good at it.

When I think about it... I think all of my girl friends learned to cook after they moved out. And almost all the boys I know knew how to cook a meal or two even in their early teens.