I don't really share sandwiches, I have an adult mouth, and I don't make sandwiches thicc or big enough to need to cut one to fit it in my hole, so I don't cut them and haven't for a very long time. If I get a sandwich that thicc or larj then someone else made it, and it's probably cut by them.

But when I was a kid, when we got home from school, I pretty much always made my brother a peanut butter sandwich for dinner. And I always sliced his sandwiches diagonally, which only really works if the sandwich isn't thicc. He probably could have managed it without slicing it, but it made him feel special and loved if I sliced it. I think I cut it that way because at the time it was the only way I'd seen a sandwich sliced... The ones at school, in hospital vending machines, and my parents probably cut sandwiches for me when I was really little, too. Also, it's just a little more effort to do it right and make it look nice and even, which helps with the "feeling loved" thing.

But on a thicc boi you pretty much gotta go straight down the middle imo