Explaining Marriage to a 4 year old!

"When I grow up I'm going to marry my sister."

"Oh unfortunately you can't do that, how about one of her friends?"

"No I love my sister. Why can't I marry her?"

"It is against the law."

"OK then I will marry my brother."

"That too is against the law."

" Can I marry one of his friends?"

" I guess you could if you wanted too."

"No I think I'll marry Mittens (the cat.)"

More wine please!