I hesitate to call post #858731 mouth-to-mouth feeding, but it's one of those grey areas that I wouldn't mind fudging a little due to the similarities.
I agree that it's not 'feeding' per se, but the romantic implications are there as well.
EDIT: I'm adding chocolate heart throughout the chocolate tag and stumbled across post #6339, so judging upon what I see, this chocolate heart sharing could be as common as the pocky kiss.