One big thing I held back (but eventually shared) was certain things I feel I need to think about while having sex because of my OCD (as in, if I don't think about those things, then something bad might happen). I feel I have to think about people getting sick (I also have emetophobia)--this goes back many years. Took me about 4 years of seeing T before I could tell her. She was fine with it and still accepted me. Then I ended up telling H and MC within the next week.