Looking to broach the topic of orgasm control with my sub, any advice?

Originally posted in r/orgasmcontrol, but was told it might be good to post here as well.​Me(F20D) and my(F18s) girlfriend already do a lot of BDSM style play, often with orgasm control/denial being a factor, but I kinda want to suggest the idea of starting something more day to day, where I have control over her masturbatory habits, and decide when, or if, she’s allowed to cum.Basically my question was is there anything I need to know before trying this out, or things we should go over in the negotiations phase? I generally try to get all the information I can before trying out new kink stuff, so any tips would be appreciated, and I’d be happy to answer any questions if it would help y’all provide better advice. female orgasm denial Get your own Orgasm Control toys: For men: http://www.amzn.to/1V6XQvv For women: https://ift.tt/1UWn54n