Should I Be Worried?

My daughter has invented this game. It's called "Bellybutton Water."

If she catches sight of your bellybutton, she'll cup her hand to it to collect what is apparently a gush of water flowing from the bellybutton. Then she brings her hand to her mouth, and down the hatch the Bellybutton Water goes. And, of course, she sighs to express that her thirst has been quenched.

I didn't teach this to her. Erik swears he didn't either. This all came from her head.

I am a little bit concerned.

Photo by another sergio.