Is it normal to think about woulda couldas?

Well, I have a normal marriage, full of its share of arguments and utilitarian scheduling and bill paying. I love my husband as a human being. He's great and I'm amazed at his looks and sweet presence. I've never liked sleeping with him, though. I feel guilty even pointing it out but he has ED, doesn't last very long and he'll make Beavis and Butthead impressions about the act that don't help me much either. We've talked about Viagra because it might be nice but I have made it clear that I can get over it and in my rational thinking I think I can but my hormones aren't helping. For one year I obsessed over one high school sweetheart. I didn't even Google him or know where he lives. I just imagined we were having sex. Then I obsessed over someone else I knew for a while who I had a falling out with. I would create intricate details of a missed opportunity with him. Some days I think bad thoughts about men I see, women, too. I feel out of character because of this. Please tell me this is normal. We have no kids. If we did would it be less normal? I'm hoping becoming a mom will put some sense into me.