Oral is no problem. I use to have one that would swell as thick as a soup can. He would usually leave it in me an hour or more. He inserted it when we went to bed. He pumped until it hurt then would make me cum. Sometimes several times and everytime I orgasm'd he would pump it wider. He bought a thicker one but it got too thick to sleep with in. If you take it as thick as you can stand and then sleep with it in, you will definitely notice you're looser in just a few weeks. Make sure being looser isnt a problem for him. If it is you wont want to sleep with it in, and do lots of kegals. If thats how he wants you though, it wont take long.