Among many cultural discoveries made over the years is that it is in Poland where I hear "No" most often in answer to my questions
Maybe you should start asking different questions, my friend :-)Here are few examples:
"may I offer you a place to sit [on a train]?"
"would you like me to invite you to a fancy restaurant, I'm paying?"
"Doesn't this politician look like a halfwit?"
"Nobody cooks better that grandma, am I right?"
I guarantee you'll hear "yes" more often