Mom, I don’t want to get a tiger

As I was putting David (age 5) to bed last night, we had this exchange:
David: “Mom, I want to tell you something.” (I cannot tell you how many of my conversations with David start this way.)
Me: “Yes?”
David: “I don’t want to get a tiger.  Tigers are not nice.”
Me: “I think that’s wise.  Okay. We won’t get [...]