I think when we get comfortable in our relationships, we assume the partner is too. It is winter, our bodies are covered, and men aren't attracted to our sweatshirts and pants. I think you will just need to plan a good time to seduce him. Wait until he has his shower, and he is turning in for the night, put on something that you think he would like to take off and go for it. We can't always wait for him to make the first move.