Would you tell your S/O your deepest, darkest sexual fantasies

Last night after many drinks, my husband and I got onto the topic of sexual fantasies, there were fantasies like teacher/student, Sci-fi etc.. but then when he asked for my deepest, I couldn't tell him. He said he had a deep dark fantasy and that if I told him, he'd tell me. But i declined and said that mine was to wrong, strange..whatever.

I wouldn't even call it a fantasy because a fantasy to me is something you wish would happen or if the opportunity became available, you would do it?

Mine.. I would not do! I do not want! to do.. but watching it in a porn video or thinking about it is a turn on. So I was to embarrassed to tell him, he went wild with thoughts, asking me if it was this.. and that.. or this.. at the end of it. I think he pretty much guessed it because he could see my reaction when he bought it up. But we cut the conversation short because I didn't want to talk about it. I woke up the morning after full of aniexty because of the conversation, because of the thought the he pretty much knows it and I'm embarrassed by it. Has anyone had a sexual fantasy that was just to weird or strange that you just couldn't tell anyone.. and did you end up telling anyone or your S/O?

(Significant Other). Also any advice on how to move past this aniexty and embarrassment on my behalf? My husband said to me that he was pretty sure he knew what it was, and although he doesn't care and if fine with it. He said he wouldn't act it out or anything.. which is fine! But I still can't get out of my own head.