Why is it never in the same place?

Admidst getting children ready for bed…

Adam: Where’s the toothpaste?

Sharon: (from down the hall)Did you try the basket on the side counter?

Adam: It’s not there?

Sharon: Did you try the drawer?

Adam: It’s not there?

Sharon: Are you looking for it?

Adam: Will you come help me?

Sharon: Ok, but if I find it…(halfway down the hall)

Adam: I found it! Why is it never in the same place???

Sharon: It’s in the bathroom; that is the same place!