Introductions discussion

Hi everyone! i’m happy to have discovered this site. It appears to be a very encouraging community! I’ve been quite curious about chastity for several years now but never had someone hold the key. I did buy a CB3000 a couple of years ago…which turned out to be a fake because it broke on me. However, some araldite from a hardware store made it even more strong:) Now i’m interested in buying a CB6000 from - it seems legitimate. The longest I’ve stayed in the CB3000 without taking it off was about 5-6 days before it started getting itchy from skin irritation. How does everyone go about avoiding that? Is it as simple as cleaning it more often? More lube everyday? Shaving? i guess the main reason why i’m here is because i want to introduce chastity to my girlfriend. We’re still young, but legal enough to enter a nightclub and this website:P We’ve been together for more than a year now and despite her being someone who is quite vanilla, she has always been open to my kinky side (such as scratching, biting, teasing). She has a bit of a laugh while she does it (i think) because it’s all new to her. But i don’t really know how to approach chastity - especially with a device. i can’t imagine the scenario going down well if i just went “SURPRISE CHASTISE ME!” - i think it’ll be too full on. What’s the best way i can introduce the idea to her without freaking her out? What’s the best way to educate her about it? Thank-Y/you for reading and thank-Y/you in advance for replying!!!:)