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A sounding rod is a rod, usually made of either stainless steel or silicone rubber, that is intended for urethral stimulation. They can be rigid to stimulate only along the shaft, or flexible if the intent is to move deeper for prostate penetration or bladder penetration. They are a common add-on on chastity cages, where they are usually hollow to let cum and urine flow through.

The name is unrelated to noise, and instead comes from French "sonde urinaire" (lit. "urinary probe"), which is a term for urethral catheters.

Related tags

• urethral
• object_in_urethra
• pussy_sounding
• anal_beads_in_urethra