I agree it is stupid and like the other posters above me, no one has said this to my face ever. The comment that I can't stand or more of an assumption is when people say to me, "Oh, when you have kids.....blah blah blah..." I usually just smile or ignore it if it is someone I don't know very well, but when a relative or friend comes out with it, I just correct them and say, "If we have kids." That way, they understand that I am looking at it like a choice not a given.
CF woman in Boston