@teleduke
I would agree with your list except for one item.
I do not equate penetration with violation. It is only violation if it is unwanted. I would add to your list of most intimate acts, giving control of any part of your body particularly anything with the genitals and breasts.
For me, giving control of any part of my body to my partner is a huge act of trust. Anal ratchets that up immensely. So much so, that I have only shared it with three of my partners. I've only shared enemas with one partner, my last one who introduced me to them.
The first partner I shared anal with was a huge mistake. He failed to stop when asked and hurt me. Ironically, I was the one who had shared I was intrigued and trusted him, not a previous partner who had been pushing me to allow him in the back door. He pushed the idea so much and so often, that while I was intrigued, I simply did not trust him to stop when I asked or go slow even though he always had with everything else. But his demeanor was so different when it came to anal, I just wasn't willing to go there with him. So instead, I trusted another (after my relationship ended with the partner who pushed the idea to much) and got badly hurt.
Years later, I reconnected with the partner who kept pushing the idea of anal and the topic came up. When he found out I had been hurt he was pretty upset. I've written about it in several posts. He is the one who gave me my first anal orgasm.
My last partner was extremely gifted in anal play and gave me multiple anal orgasms and regular multiple orgasms as well. After having a partner who was into and skilled in anal, I find I'm not open to a relationship without it anymore. Regular orgasms seem to cause an anal "ache" the way I can ache for regular sex.
I'm curious to explore enemas more but only with a partner. Hmmm, I guess this is also answering would I marry a vanilla, and the answer is "No".
My two cents...okay closer to 5 cents maybe 10 cents.