Maternal Drive

I have never really had a maternal drive to the point where I just *had* to be a mom, regardless of how it happened. My desire to have a baby comes from wanting to have one with my husband, for us to be able to combine pieces of ourselves as a reflection our love for each other. I don't talk to many people about our fertility challenges because most of the advice is 'just have more sex,' or 'well there's always adoption.' It's so much more complicated than that, and I don't think I'm really interested in adoption due to my low/lack of that maternal drive. I don't think this makes me a heartless person, because I love the children in my life that aren't mine, I just don't think it's right for me. Plus, adoption is not just a toss-away last resort for those who can't get pregnant - it's a life-changing event for everybody involved, in particular the child. I would love to know if there are other women out there who feel like this, not really much of a maternal drive, but more a desire to have a child with your significant other.