There used to be a popular T-shirt that read, "I wanted to have a baby, not marry one!"
In fact, women can easily fall into the trap of mothering their mates. First, women's higher levels of oxytocin make them prone to mothering behaviors. And, let's face it, men who grew up with mommies who took care of them sometimes have a difficult time transitioning to independent adulthood. Finally, many men seem to not care as much as the women in their lives about things like neatness and nutrition.
These factors make it all too easy to fall into mommying him: Picking up after him, reminding him to take care of himself, making doctors appointments for him, etc. According to this article on CNN Living, it's a really bad idea.
Babying the man in your life can mean two things, Tessina says: A. You've been spending too much time being mommy and may need a break from the kids, or B. You need more adult contact, whether it be a weekend away with the girls or a few hours at the mall while the kids are with a sitter.
Tessina says that normal nurturing -- cooking for him, massaging him, tending to him when he's sick -- can feel motherly if you're too controlling about it. "Instead, tell him what you'd like to do to help him, and ask him if he wants that kind of help. This evens the field and makes you equals," she says.
I would add that it can ruin your sex life and your whole relationship. All that oxytocin a woman generates can make sex with him seem unconsciously weird, and oxytocin is not the hormone of desire, it's the hormone of fulfilled desire, aka orgasm. An excess of oxytocin also can damp down the effects of his testosterone -- not a problem when he's a young bull, but increasingly an issue as he -- and the marriage -- ages.
Besides, who wants to make love to a baby?
Read the article for amazing stories of how far some women go.