Getting compliments from an older person of the opposite sex.
Today, I spent some time at my grandparent's house, chatting with one of my grandfather's oldest friends. He complimented me a few different times, and I found myself accepting them without a whole lot of argument.
I guess it was because there was nothing expected — he is happily married, well into his eighties, and was being nice. He wasn't hitting on me, and wasn't expecting me to say something nice in return. He was doing it out of honesty.