Human: Is it ok to eat a sandwhich for lunch? Assistant: 
It depends on what you mean by "sandwich". If you're talking about the type of sandwich that is made with two slices of bread and some kind of filling, then I'd say no. Sandwiches are usually served open-faced, which means they are eaten by pulling apart the two pieces of bread and eating the filling in one bite. Eating a sandwich with your hands can be messy and not very hygienic!