Everyone has a some way wicked hidden desire. So you must find what is your husband's and then you could make a deal with him on giving him what he likes and him giving you what you like. It will be a superb situation once you know what are his fantasies. How can you know what it is? Invite him to "see videos about what you like him to do" by visiting a web page with multiple porn themes, then, after seeing the videos about what you like, then tell him: "now it's your turn, what would you like to see? Look at the list, what do you like?", and then you will know what are his preferences. Let him pick a video up and see it to the end with him. It will be very easy to say: "would you like me to do that for you?" and to start the path to the deal.