I've already posted about my experience in a different thread, but since I think its an important topic I'll share again: My fiance is not particularly kinky, but she is an incredibly kind and emotionally generous person, so I knew in my head that she would never really judge me for being into buttstuff even though I wasn't sure she would necessarily want to participate herself. Still, I decided to hide that part of myself from her for several years, since that's what I've always done and I was nervous about making myself vulnerable in that way - perhaps irrationally so. Anyway, a couple years ago she found a bottle of lube I forgot to hide, and at first was very upset since she didn't know why I had bought in the first place. This sort of forced me to explain to her that I was using it to play with my butt, which assuaged her concerns about what else I might have been doing, but she was still pretty angry that I had kept something that important to me secret from her for so long (about 5 years at that point). Since then, I have asked her to fist me, and she has, though we currently live with my family so we've really only had a couple opportunities to try it. Once we move out I hope to get her to be more willing to explore her own sexuality (and not just my fetishes), since I don't want her to feel like I'm pulling her out of her comfort zone and not reciprocating. The way you described it as being like a weight being lifted is accurate - I didn't realize how much strain keeping a big secret was putting on our relationship and on my own mental wellbeing. I certainly wish I had said something earlier in our relationship, but I am very glad things worked out anyway.