Hurt sooo good

Last night my husband finally got his whole fist inside of me and it felt amazing🙌🏻 We have been working on it since we became pregnant over a year ago (to prevent tearing during birth). It was something that we really liked and kept up and now we finally got the whole thing in! It's such a turn on for him and feels great for me! Anyone else venturing into this?  
****Really? I'm the only one? 
Update: yes! It helped so much! I had an unmedicated natural birth and my baby was over 9lbs. I didn't tear one bit!!