When you meet someone new who instantly gets you your sense of humor and your attitudes and your worldview even if theirs are different - and you get them in return. You both talk and talk and agree and laugh and nod and yes yes of course you should get another round of drinks.
I have taught history on the high school and college levels and am or have been a lecturer at the Smithsonian The National Institutes of Health and numerous colleges and universities mostly on science fiction and technology subjects.