Living with Bob and "Al"

Sheri watched with a sad kind of fascination last night, as Bob struggled to rebuild a hamburger that  had slid off the bottom part of the bun. "Al" tried and tried to figure it out, each layer of lettuce, tomato and onion making it more and more complicated. He wound up spreading it out on his plate and wrapping a piece of onion in one half of the bun and eating the rest with his knife and fork. Sheri sees such subtle changes. She hates this disease.