Oura won a patent dispute with Ultrahuman and RingConn. The competitors infringed on form factor patents, the ITC ruled on Aug. 21. Ultrahuman and RingConn smart rings can no longer be sold in the US.
That box of assorted rubber O-rings under the workbench in your shop might supply the cure to leaky hydraulic connections, or it might just interrupt the leak for a day or two. Flat-face hydraulic ...
Cock rings are rings that go around the penis and/or scrotum. They slow blood flow out of an erect penis and can help make erections harder and longer-lasting. Some also have knobs or little vibrators ...