I have been known to have a mint or two, I must confess, but I try not to make a big thing of it, open-mouthwise.
But, and this is the big thing, this lets me offer a mint in a "social" way to a partner with less-than-fragrant breath - i.e. "I'm having one, please have one too", rather than "Oh God, your breath stinks, please have a mint before I die of asphyxiation"...
Of course, I can also offer mints in a social way anyway
But chewing gum, no, yuk.