I'm finding it quite funny these days that my kids come to me and ask "Dad, can I ....?" and if I say 'no' they ask why and want to argue, but I tell them 'What if I said 'Yes', would you still want an explanation and argue?'

If you ask me a question with a 'yes' or 'no' answer be prepared to accept the 'no' as much as you do the 'yes' ;)