The Scientific Way To Cut A Cake

My wife discovered this video of mathematician Alex Bellos explaining how you've been cutting cakes the wrong way...

I have two problems with his method. First is the use of rubber bands to keep the leftover cake together. Having never seen or used a clean rubber band, I don't want it touching my food. Second is the assumption that only a single slice is being cut from the cake each day -- suggesting a picture of a very lonely person sitting alone with an entire cake, a scenario in which it's unlikely that person is limiting him/herself to a single slice. And then doing it again on day two and three. What a happy birthday celebration!