My guess would be that he got it at the "sample" wall in some drug store or WallyWorld type store. You know, where they have the little containers of toothpaste, deoderant, shampoo, hair spray (don't use the stuff myself), etc. Not being a user of Sensodyne, I have never notice a little tube of that particular brand, but always have a little tube of Colgate or something in my shaving kit. My dentist usually gives me a new toothbrush, mini-floss, and a little tube of toothpaste when I have a checkup also. Getting all of the toothpaste out of the thing is what amazes me...