Mine did when I really started getting into car seats and safety, somewhere around 6 years ago or so. He thought I was "overprotective" and his family thought I was nuts. I finally started telling him that when he did the research on carseats and what was safest he could have a say in the decision, and if he could find anything from a reliable source saying that I was going overboard we would discuss it, until then it was not up for discussion. He did read several things, and realized that I was right. Since then he has left the decisions concerning seats to me, including if we need another one. I look at it this way, the leading cause of death of children over age 1 is car accidents (I'm pretty sure anyway, but someone will correct me if I'm wrong, please). I have to put the kids in the car, so shouldn't I make sure they are as safe as I can possibly make them? It would be nice if we could avoid the car, but we can't, so we have the responsibility as parents to protect them.