Neither? The whole point of a burrito, at least one of these style of burrito that isn’t swimming in some kind of sauce, is that it holds together well enough that you can eat it while holding it in your hand without making a mess. If it’s poorly wrapped then yeah it’ll come apart and you might want a plate and flatware to finish the job.
So do you use a fork or a spoon?
Neither? The whole point of a burrito, at least one of these style of burrito that isn’t swimming in some kind of sauce, is that it holds together well enough that you can eat it while holding it in your hand without making a mess. If it’s poorly wrapped then yeah it’ll come apart and you might want a plate and flatware to finish the job.