Yup, same story. Some are adjustable, and some aren't. I've had quite a variety, and I do prefer the adjustable. The ones that have the screw you can adjust are great. The clamp style is nice, but after awhile I always want it to ease up! You can also try Nipple Suckers if you want a similar sensation, but want a baby step approach. They don't stay on as well, but give the pulling/pressure feeling. Happy Clamping!