When I first told my wife (before we were married of course) she thought it was really weird. However, before I even asked her she agreed to do it with me. She seemed to have a lot of fun at first, we'd wet and change each other and even make love in diapers. After about 6 months or so she suddenly didn't want to do it anymore. I didn't really ask why, I just assumed that she was in to it because it was new and exciting. When it stopped being exciting, she lost interest. We've been together 8 years now and I still wear diapers. She no longer does but will occasionally agree to change me. She doesn't understand why I like to wear diapers (and really, how can I expect her to when I don't understand it myself), but she accepts it and doesn't judge me. She understands that it's an important part of my life. I don't know if you told your wife before or after you got married, personally I don't think it's very fair to do it after. I waited until we were at a point in our relationship where we knew we loved each other, but before I asked her to marry me. She had the option to walk away at that point. It sounds like your wife is just doing it occasionally to please you. Be happy with that and don't force the issue or try and push it on her too hard. If it's always in her face she'd be more likely to resist.