Read my signature. 
I am a father of 3 kids. Two boys and a girl. She is 8 but she wants to help daddy whenever I cook something. The boys have to be requested to help out though.
I got that expertise in household affairs when my wife was very sick for almost a year and could not do anything around house.
I also come from a big happy family and we had a joint family system so while studying , playing , watching TV I could overhear my mother , sister , bhabies ( I had five of them all living togather) talking about all this stuff.
But trust me back in Pakistan I would not know how to even boil an egg or make tea I knew all the theory but no practical experience. 
Now I can write a book on adventures of cooking and other household affairs now.