I excitedly opened the package and fell in love with the smooth surface and the color of this toy. Its like a piece of sculpture. This plug is the first larger diameter thing I have shoved up my butt. I've used the Aneros for several years and have learned how to use it to get great effects. But the Pyrex Butt Plug is whole different experience. The first time I tried to insert it, I couldn't get it in no matter how much lube or how hard I pushed. I almost gave up after a second try as my hole hurt for several days from the attempted stretching. Then I thought that maybe I needed to work up to the size by stretching my hole with smaller plugs. I bought Extreme's Trainer Plug set that has three graduating sizes. After working my hole over with the trainer plugs I was able to slooowly work in the Pyrex Plug but it was very uncomfortable. I set it aside for a couple days and went through the excersize again. I slowly and gently pushed it in as I tried relaxing my ass. WHALA! It went in before I realized it. The discomfort was gone and it felt suuper! I was surprised to find that it stayed in and I could walk around. I also found that as I walked I was having some great feelings and was oozing pre cum. I can't wait for my next session. I love this plug and I'm very glad I didn't give up on it. 10 stars for this toy!!