I've been on this forum off and on for a few years and playing with various devices (settled on the MM Jail Bird as best for me, but also have a Queen's Keep and a couple of the German Steelworks devices). My wife and I have played around with chastity and tease & denial and enjoyed it, but she's really not a Domme. I've never done more than a month, and that only once. Usual lock is one to two weeks with a break of a week or a month between lockups. A while back I met a Domme at a CFNM party in Manhattan and we've become friends and done a few scenes (pegging, whipping, ball busting, toilet play and the CFNM parties). I went back into my Jail Bird six days ago and decided to let her decide when I can unlock. She wants me to do another nine days as a start. I am at the delicious point I get to after five or six days where I am hyper-aware of being locked and swelling my my cage off and on during the day. I've never felt I got much additional thrill out of not having access to my key/security screw (I think unless you have a PA you can pull our of almost any device if you really want to) -- I know a lot of folks are really into that, but for me the commitment not to cheat is enough and the device is really more just to prevent moments of weakness. It does, however, feel different having given control of my lockup time to a Domme. If I were to unlock myself or pull out, I'd be breaking faith with a friend. And, she is evil enough that I know that it may be more than another nine days.
We're kinksters from way back, though she is mostly submissive. She understands and accepts my switch side, and enjoys edging and CBT and prostate massage after I've been locked for a while. She can be a service domme when I ask her to, but she just isn't cruel.