Isaac [holding a kitty at the County Fair]:  “Can we get one?  They are so cute!”
Richard: “No, I’m allergic to furry creatures.  They can’t live in the house with me.”

[15 minutes later]

Isaac: “You should move out.  I really want a kitty more than living with you.  Kitties are babies and more important.”
Richard: “Won’t you miss me?”
Isaac: “Not too much.  After a year or so, when I am tired of the kitty, I’ll come live with you for awhile.”