Not sure I understand the attitude switch because I was the opposite. Very uncomfortable and secretive about my sexual "escapades" when dating but married a guy who I enjoyed having sex with. When married, I felt more comfortable with everything. Since you once desired him, you probably can get it back somehow, you just have to figure out what is sabatoging it. Do you have a lot of stress? Perhaps there is no time to get in the mood (responsibity) or maybe there is an underlying issue that could be explored in therapy. Also, I tend to feel less sexy when I gain weight/get out of shape. Because it makes you more flexible, I think going to a yoga class on a regular basis improves your sex life. In the meantime, when you are not in the mood, I have always found that giving a blow job is a simple way to accomodate when he is in the mood but you aren't. It could just be your hormones too (you could consult a doctor)-- I do think there is a chemical component to sexual desire. Keep reflecting, observing and there is a good chance you will figure it out.....