Does this Mean They are Growing Up?

Today I took my son to Party City so we could get him something to wear for Halloween. He stood there, looking bored, while I suggested different things. Finally I asked him, "Do you even care?"

And he said "No."

Hmmm.

So, we left without a costume. For the Halloween parade at school he will wear what he wore last year.

As far as trick-or-treating. He'd be okay if I just bought him some candy. I think his sister might agree.

So it looks like the end of an era.

Why do these things always take me by surprise?