Great item, wife loves it, she said she would not like it but after the first use I heard noises from her I never heard. For best feelings you should have 5-6" dick already. Any smaller may by difficult due to the opening inside and you should try the Ride On version. For me it feels like a blowjob during sex, I cum due to the suction effect created on the inside. My wife loves having sex (making love) with me without this thing ( Colossus ) but I have to admit she also really loves just to be fucked once in awhile, her moans are outrageous, and she had her first squirting orgasm with this thing after 15 years together, I love it.