Main category for Urethral toys such as Urethral Sounds, Penis Plugs and Penis / Glans Jewels. A very intense form of stimulation for Men and Women – although the vast majority of toys we see are primarily focused on men. longer flexible silicone urethral probes are even capable of stimulating the prostate gland. Whether Silicone or Metal, sterilisation is extremely important for safe play and a sterile water-based lubricant is recommended.