Introductions discussion

Hi all. First off I apologize if this is in the wrong category. I just discovered this site and the section names are a little confusing. Anyway, I’m 24 and have loved bondage since I found it around age 16. Probably even before that, I just didn’t realize it consciously. My girlfriend knows I really like the d/s dynamic, and every now and then I get tied up for some kinky fun. The other day while reading articles online, I stumbled upon male chastity. It was something I knew about but never paid much attention to. Honestly, I thought it seemed a bit odd and wondered why anyone would want that experience. But after reading the article and understanding its purpose, I became very interested. I started researching male chastity and thought it would be great for my girl to have total control over my cock. The idea of not even being able to masturbate without her permission, along with the notion of my penis essentially being in bondage, was a huge turn-on for me. That was about a week ago. About two days ago I gathered up the courage to bring it up with her. I wasn’t sure why I felt surprised; I expected her to say no firmly, but she agreed that it would be really hot. Since then, I’ve done quite a bit of research on cock cages and similar items. For a beginner like me, there are so many options it’s overwhelming. I’ve read reviews, and everyone seems to recommend different things. That’s when I found this forum and thought the best thing to do would be to ask people who actually use these devices. So thanks for taking the time to read my intro. Now onto the main question… I’m looking for something she can lock on me for a few days. I know some guys wear them for weeks or even months, but what I really want is two maybe three days trapped inside. If we like it, I might try keeping it on for about a week if I feel brave enough. Anything longer doesn’t sound right for me personally. My main interest here is the bondage aspect. Another important factor (though not decisive) is that the cage shouldn’t let me slip out easily. To me, being in a cage means I can’t get out unless she allows it. If I can just slide out and back in on my own, then I will do so constantly. And that ruins the fun! I’ve seen the cb6000 and it looks like a solid starting product without costing too much. Keep in mind this isn’t going to be a full-time lifestyle for me yet; more of an occasional thing. Is the cb6000 a good choice, or am I looking at the completely wrong place? The main points are short(ish) captivity so long-term suitability doesn’t matter as much, and how secure it is. Also most important of all is that I don’t want anything that could cause any real or permanent damage to my penis Thank you very much for any help. I really appreciate everyone here.