I have to admit, with my oldest (who will be 15 in Aug) I caved quite a few times. That little "I sowwy" is very hard to resist.
By the time the second kidlet arrived (he'll be 13 this year!
) I was almost immune and only caved once or twice.
Now with the 3rd one (who will turn 6 next month) it doesn't even phase me anymore. I am finally immune!