Here's why:

* Fizz is caused by the release of gas. This usually happens during a chemical reaction.

* Most pure metals are relatively unreactive with water. They may form a thin oxide layer on their surface, but they don't readily react to produce gas.

Exceptions:

* Alkali metals (like lithium, sodium, potassium) are extremely reactive with water and will violently fizz and release hydrogen gas.

* Alkaline earth metals (like calcium, barium) are also reactive with water, although their reactions are less violent than alkali metals.

* Certain metals, like magnesium and aluminum, can react with water under specific conditions (like high temperatures or in the presence of acids). These reactions may produce hydrogen gas.

Therefore, while some metals can react with water to produce fizz, it's not a common occurrence for pure metals in general.