grammatical number - What is the plural of "chewing gum"?

What's the plural of "chewing gum"?

Hearing "do you have any chewing gums?" sounds wrong; I would say "do you have any chewing gum?", but looking it up, there seems to be a bit of confusion on Google. Some results indicate that "chewing gums" is the plural form of "chewing gum", while others say that "chewing gum" is an uncountable noun, and has the same plural as the singlar form.

Answer

Chewing gum is an uncountable (mass) noun, and therefore follows these rules for plurals:

singular: chewing gum This chewing gum is delicious.
plural 1: chewing gum Do you have any chewing gum?
plural 2: chewing gums Ten of the chewing gums in our test lost flavor after two minutes.