If done gradually, cervix play can be safe. Probe set has to go from the thinnest toward thicker probes, well lubed and clean. My gf went nuts over this, but we play it safe, never more than twice per week with at least 3-4 days between the sessions. We're at the point where my middle finger can go all the way in and it is almost time to try slide my cock inside it, but slower is better, no rush. Her orgasms were never more intense, her whole body shakes 15 minutes later. Depending on how smart and hygienic you go about it I would recommend this to all women to experience and enjoy, just be safe and stay safe. Luv ya all girls