Dear Higal,
Not to worry, your husband is still interested in ML, the only thing is he feels boring. Talk to him to come out and experiment with some ML positions. If you change into new ML positions, ML will be less boring. Also you can change the place for ML. Check if your husband has any sexual fantasies ? Like he gets turn on when he sees women in certain uniforms. You hear about stuff like role playing?
I blog a lot on sexuality topics and on my blog, I often have articles on how to improve sex life. If you're free, you can click
here. My blog is to get guys to be good lovers and husbands.
OK, I hope you can find my articles helpful to you in your ML.