Chastity and orgasm denial discussion

Hello, My wife (who is now my Mistress) discovered I was unfaithful and chose to put me into chastity. Security is her main concern since she doesn’t fully trust me yet. I have bought a device that looks very similar to the one in my avatar picture, and I am just waiting for it to arrive. I must admit the concept of being kept in chastity really gets me excited, but I could use some advice. This particular unit includes a urethral plug—do you need lubrication with these? Has anyone here worn them for an extended period? Any guidance is welcome.