My father feels that the thousand of dollars in tennis lessons, braces, tuition, and clothing he's paid for somehow entitles him to special "rights". He says giving my daughter (then 1) her first Pepsi was his God given right as a grandfather. Today, my 5 month old got a popsicle out of him....he says Eli asked for it, I have my doubts. He also pulled the "Grandfather Rights" crap when he brought over a 9 piece drum set for my 10 y.o. too.
All I have in response is that I get to pick his nursing home so he'd better use his "rights" wisely.