Butt plugs

So me & my boyfriend have been getting into a lot of butt stuff. He started off putting his thumb in my butt & we slowly advanced to anal. We’re trying to add some fun to it so if you have a favorite butt plug please recommend me it! I’m very comfortable with butt play, I don’t think I need a beginners anal plug but I’m also not sure because it is my first time using one. Let me know what you guys think!