How come you don't need a hammer or anything like that when eating lobsters?
In real life, the lobster shells are too defensive to chew.
So if they can be eaten in one bite, and doesn't require anything, how come watermelons need to be sliced?
You can actually eat watermelons directly without using a knife in real life.
Well, that still counts as using a knife since you are using one from the toolbelt.