As has been indicated by many, the larger the man is, you might wish to consider some Preparation and practice before you decide to have anal intercourse with a large man. I have a fairly extensive collection of toys that I play with. I like to think of it as giving myself "ass-workouts" to work on streaching for girth, and and depth. I enjoy the feeling of a large male, (over 7) because his penis is long enough to go from rectum into colon. I enjoy the full feeling. . and the deeply penetrated feeling.
I have a very gifted dom, who is my fuck bud, and he is 9x6. If I have not been working on my toys before playing with him for a few days, he can hurt on entry. After a bit, I tend to relax and loosen up for him.
If you may wish to be seeking advice I might say that if you wish to get with a massive dude, consider some ass workouts, to prepare for your stud. Sometimes as the say eyes can be bigger than stomach, (or in this case ass). If in experienced a horse hung man, May hurt you even. . and you both could either end up unfulfilled sexually, or a painfull trip to a doctors office. Some men are so large, that they require the (advanced class) of bottoms, to be able to handle them comfortably and safely.
just my 2 cents. .
Syl'