One of your kids gets ill at school and needs to be collected straight away. You're out having lunch with your mum and he's at home with the afternoon off work - who goes?
a) He does, it's only fair. You've had this lunch date planned for ages and your mother would kill you if you pulled out last minute.
b) You go. Its his day off after all and you can see your mum soon
c) After a long talk deciding who should go, you volunteer yourself again
d) He goes and doesn't suggest that you should. He's a gentleman.