A bee has a barbed stinger at the bottom of the body. They only attack to defend themself they sting you. Only when you insult or annoy them they will strike.
A drop of poison is injected from the stinger through a tube.Did you know that only the worker bee stings?The sting is fine and sharp.
If you have heard that a bee can sting once, there is another theory. When it stings a person and if you knock it off you will injure it so bad that it will die. But if you wait it will naturally come off.
It is true that a bee can sting as often as we allow it to. That is only if we don't injure it and kill it .