No holding back as ever, Elicia, I like it!
A girl I dated once said to me something along the lines of, "if you want to penetrate a man or woman’s anus, make going super slow and water-based lube your best friend. Otherwise, stay the hell away from people’s bum holes."
That statement just seems quite fitting based on what you have written! Especially as I can recount a good few anal horror stories that I been told from women I know that are similar to the ones you written, one girl I dated was permanently scarred down there from a previous partner! It really is a great form of sex, but as you say, only if it's done correctly.