Initially it kinda just came out. In my mind, I was mortified for ages to even consider anything like it so that's why it took so long but when we got to discussing my surgery, which is related to periods and such...I just started taking casually about it and was like, oh wait, he's just sitting there normal.... lol... and he seemed really sad for me and was kind about it all, so after that initial convo, I was so comfortable with him as it was, that it just became normal seeming to bring up...like I would with a female friend or something.