This was my first sex toy. I am a 28 year old male who wanted to try anal play with my wife. After some lube and a little warm-up, this toy slid right in. It was a great size and felt so good going in. Once in, it stayed in with no problems. I thought the medium would be too big, but I am glad I did not go with the small. This size was perfect. I look forward to using this toy over and over again!!