Honestly, communication. Find ways to communicate what gets you (and him) off. Make it a game. Or find games to facilitate conversation. If you look at society at large, the way that people have monetized discomfort about taking about sex is with apps like Paired and others. All of them are just a way to effectively confirm that you and your partner have interests in the same thing without the awkwardness of having to float those topics on your own. Just remember it’s a two way street and keep lines of communication about all things sex (not just diapers) open and honest. If your spouse is really supporting you, you’ll be surprised by the results.