Chastity and orgasm denial discussion

Hey everyone, love the site! I wanted to get opinions from men and women on how to introduce chastity into an otherwise vanilla relationship. First a bit of background and context: I have had an interest in femdom for as long as I can remember, but never the “beat the shit out of you” sort of thing. And not even bondage, really. Chastity was sort of the missing link - a bridge between vanilla and female led relationships so to speak. I have never vocalized these desires with a partner, and it has been pretty much in the back of my mind forever. I have been with my girlfriend for 2 years now, and love her very much. We are both 23 years old, and she is naturally dominant, controlling girl, but beyond a few toys, we do not do anything femdom related or kinky. I am positive she would love having the level of control chastity can provide. It also seems to me to be an incredibly romantic and powerful gift for a man to give. Additionally, in past relationships, she had been cheated on. I think this would go a long way toward healing that kind of emotional damage. Ideally, I would like the chastity to be an enhancer of our sex life. Less regular, but more fulfilling. I am not really turned on by the idea of being locked up for 6 months and never again having penetrative sex. She enjoys it too much anyway. Also, I am not into crossdressing, cuckolding or anything like that. That being said, How would you approach this situation? I am hesitant to just come out with it - as it may make her feel like I have been keeping other secrets or that she does not really know me at all. Any advice is appreciated!