But Plugs for men. The bigger the better!

I am a male that recently got experience anal play with my wife. It is now a regular part of our lovemaking. So much so that I am interested in taking it further. We have fantasies about mmf encounters while making love. I would like to try larger toys and have purchased a toy that is larger than what we have successfully used to date. Just the heft and size is so erotic to me. I need some advice on how to "use it".