Female led relationships discussion

I hope I’m posting this is the right place. Anyway I’ve been reading a lot of the threads, and I’m more interested in this that I thought I’d be I believe now that I really do want to get into it. The only thing I’ve really posted on here was a welcome message when I signed up. So the help I need is: what’s the best device to put him in? This is obviously for starting out. I’m thinking of a long-term lock-up too. Some of the pictures of locked devices seem to have something going into the pee hole; what is this for? Hope I’m not asking too many questions. Thanks