Great for some
Some women like it, some love it.
Some women do it because their partners want to try it or really like it. And some women not only hate it, but hate even the idea of anal sex
. If you like it, and you use lots of lube and you are gentle then do as you wish. The anus does not make any lube so use a lot and reapply often. If you don't want to do it, don't be pressured into it. A torn anus is bad!