At What Point Does Marriage Come Up In A Relationship?

As I've said before, I've been in a relationship for nearly eleven months now but we've been friends for over a year. Last night I called "Paul" for our routine nightly chats, he lives in a different town than I do for the summer, and I happened to be watching "Say Yes to the Dress". Now I'm sure I'm not the only one with which this show has resonated, the crazy sales clerks, the beautiful dresses, the bridezillas and momzillas...it's absolutely awesome! Similarly, I'm sure I'm not the only girl who has dreamed about marriage and the Cinderella fairy tale wedding which is probably why I love the show so much. Anyway, as I was watching the show my thoughts drifted toward marriage and I asked the question most men dread: when are you going to be ready to marry?

Okay so before anyone freaks out because yes, I am eighteen but no I wasn't asking him to walk me down the aisle any time soon. See, I'm a planner and I always have been so I have a vague idea of the age I want to get married and start having children. In my family the age 30 is the reproductive cut off without in vitro or adoption, my mother went through several different procedures to have me and she was only 28! So my plan has always been to get married when I graduate college, when I'm 22, and start having children by 24. I know that seems young to a lot of people but I want four children and I've known about my limitations for a LONG time.

So all I was asking him for was a "save-the-date" two years ahead of when I want to walk down the aisle. I think a two year engagement is ideal while I'm still in school. I guess what I'm asking is was this conversation too early? Should I not have brought it up since the ring is another year and a half off? Any comments are appreciated!