According to most Poskim “one brain” is assur miDeoraisa.
Oh my goodness… thanks for telling me. Since I have only one brain, I must now go out to the brain store, find another brain for myself (and everyone else in my family since they also have only one brain each) and find a way to stuff the additional brains into our heads. Perhaps up through our nostrils might be the best way.
Off to the brain store…
The Wolf