Impending Obsession-Compulsion?

I read a magazine the other day that suggested singing “Happy Birthday to You” in your head while you wash your hands. Apparently it takes ~20 seconds to sing that song, and it was recommended that I spend at least that long washing my hands.

As such, I have been singing “Happy birthday to you, happy birthday to you, happy birthday dear Dr.Faulken, happy birthday to you” more this week than I have in the last five years put together. I am beginning to wonder if I am going to develop some sort of disorder, wherein if I actually have to sing that song for its intended purpose I will feel the urge to wash my hands — or worse yet — will be unable to wash my hands without singing that song in my head 25 years from now.