I have to get my 2 cents (or half of that would be 1 cent) in here!
I make two sandwiches every day which each contain two slices of bread, condiments and a good-sized stack of meat, veggies or PB&J. I slice each sandwich in half down the middle. Then I pack one full sandwich and 1/2 of the other sandwich into a bag for DH to take for his work break and wrap the other half on a plate for me to eat later.
So you could say he takes three half sandwiches, or one and a half sandwiches, but he doesn't take three sandwiches....at least not in my thinking. I have a half sandwich because that is all I can eat (with raw veggies or fruit).
Oh, and when I was apprenticing in the catering/cafe, I worked the sandwich station. One sandwich = two slices of bread with filling, and we always cut them in half and packaged them together. We sold half sandwiches, which meant we would take that sandwich and package the two pieces separately!
This is the kind of fun thread we need here.