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.