How do I poliely refuse when people insist I taste their beverage/vape or anything else that involves putting my mouth where their mouth just was?
I can't stand it when people insist I taste their beverage or new vape flavor or dinner entree. I am rather cautious about exchanging germs with anyone else. If I am in an intimate relationship with another person, I don't mind drinking or vaping after them, although like Seinfeld, I draw the line at sharing a toothbrush. However, if you are a casual friend or acquaintance, I am positively adverse to sharing. Most people are content with a simple "No thank you", but some adamantly insist that "You simply MUST taste this." What is an inoffensive way of saying "thanks, but no thanks" when they continue to persevere? Or does one simply say "I don't not wish to exchange mouth germs with you?"
Edit: I just realized the post "title" misspelled "politely". I am terribly embarrassed, but can find no way to correct the error.