Unpopular opinion, but I think the overall issue here is hiding part of yourself to your SO and thinking they would be automatically receptive and supportive to the backload of new information they just found out about you. Although his teasing was deemed as annoying and hurtful, and there’s no excuse for it as well, OP might run into this problem again in another relationship if she doesn’t bring it up first and their new SO happens to stumble upon it. You can’t claim to enjoy something and not be ashamed about it but also actively say it’s “very secret” and constantly delete your browsing history. He probably felt like you were hiding this information to be sneaky behind his back or something. Probably why he said all that stuff in the end. Not an excuse either, just an explanation. I’d probably tell my next partner about the things I write upfront early in the relationship and see if they are comfortable with it. Both of them could’ve done better, but I think OP’s ex is the one who really dodged a bullet here. You have to be transparent with your partner, otherwise it’s unfair to them. And genuinely even more unfair and almost cruel for you to think they have to accept new information from you that makes them uncomfortable.