Does your husband ever feel like just a sperm bank?

Ugh, I love having sex with my husband but I get more turned on when I know we're trying. So I want it all the time for two reasons 1.) turns me on knowing we could make a baby 2.) I really want a baby. He wants a baby too but wants it to happen more naturally. But we never have sex that much, he just doesn't want it as often as I do. He's 8 years older then me. And when we do have sex spontaneously he always pulls out!!! I think he gets scared or something. We just had a miscarriage two months ago and he was even like this before we got pregnant. (We were trying and he was finishing in me) but it's like I have to nag and beg for this. I know he wants kids too but why does it feel like I'm the only one excited to try! He always tells me he just feels like I only want it when I am ovulating or if he'll cum inside me. Well yes that's true but I also enjoy the sex part! Just wanting to talk to someone who's partner is like that too?!??