I believe that Sidney Pottier addressed this issue best in the old black and white "Look Who's Coming to Dinner". He quite respectfully went off on his father (a retired mail man) because his father felt slighted when his son (who became a doctor due in part to the sacrifices that he and Sidney's mother made in order for their son to have a better life) decided to marry a white woman. Sidney passionately told his father, "I owe you NOTHING because you were only doing what you were SUPPOSED to do, but YOU OWE ME EVERYTHING!"
To this day I get chills when I think of that speech. It was a turning point for me, personally as I had always been raised to believe the opposite, that a child OWES their parents respect just because they were born. Children do not ask to be born, but are brought here for the selfishness of the parent(s).
It is because of this that I strive EVERY SINGLE DAY to EARN my children's love, trust and respect with my every thought and deed.
Having said that, I find it even funnier when a man feels that they should somehow get gold stars on their foreheads every time they change a diaper or pick their kid up from school as if they did something above and beyond...
Anyone who decides to become a parent OWES THEIR KID(S). period