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Never use on the spine: Especially the cervical (neck) and lumbar (lower back) regions, where excessive pressure can be dangerous. Alibaba.com gay massage tube
If you are using these guides to learn techniques for a partner, keep these safety tips in mind: Never use on the spine: Especially the cervical
: Limit intense work to 15–30 seconds per specific muscle group to avoid tissue damage or overstimulation. gay massage tube