Dear Maria,, From your information I have observed few things. you are always comparing your past to the present. No I don’t think you should do that. And also what is the interested thing in his past life cannot you let past go as a past. And focus on your relationship what you have right now. I think you are thinking too much about everything. As you said on your own if he cares for you deal with finances with you if he is not cheating on you if he is truthful about what he do I think you should not complain about sex or try to dig his past. I can say that you are over thinking about everything.
First of all take a deep breath and leave past behind….. don’t think about again and again or don’t compare that disturb the relationship.
Second ….. be happy that you have some one who cares and who still there with you.
third… do something turn on his sexual interest. Like wear some sexy dress use some romantic perfume,, make a day only for two of you if there any possibility. Like give your kids to a friend or grand parents and go a for a out and see if that works.