i definitely talk to my kids about sex, relationships, and babies too soon. they also have to help out with our babies- change diapers make bottles, etc. they do complain it is hard work and they HATE diapers. but my FAVORITE thing is i LOVE taking them to the store with me when all i need is baby supplies for the week- food, formula, diapers, wipes, etc. they are STILL floored when the total can easily be $50...just for the baby. i like to remind them that babies are expensive.
there was also one time when my then 10 year old dd said she couldn't wait to have a baby....when she was a teenager (YIKES!) because she wanted someone to love. we happened to have a newborn in the house at that time, so we got her up all night long- whenever we got up to take care of the baby, she got up with us. the next morning she was SO exhausted...she just said, "i didn't know he woke up all night, babies make me tired. nevermind." lol! i really am going for the more practical "babies are hard and cost alot of money, you probably want to try and wait" road. i hope it helps.
what are you doing?