Man advice on man anal orgasm

First and foremost I think it’s the most hottest thing ever!! Ok so I want to give my husband a orgasm by just anal play! But I don’t know how to do correctly I don’t want to hurt him or make him feel uncomfortable. He lets me play but I want to give him a full on orgasm witch I know it’s possible I seen a lot of guys on porn do it themselves.

So what are the best toys? How do I move my fingers? Or should I use toys?

Btw he is open to it just have to keep it where it feels good