Guidance on Prostate Milking

Sorry, but I’m still getting used to navigating the Forum. I’ve been looking for a general guide or beginner’s explanation on Prostate Milking. My wife is likely going to lock me up again after quite some time off, and she describes it as lasting “a very long.” She wants to understand more about the theory and practice of PM—specifically along the lines of her asking, ‘Can I make you come while keeping your cage on?’ I admit I don’t know enough either, so is there something available that I can print out for her? Thanks.