Tomdpimp, I've come back to this a few times meaning to post, but finding it hard to put my thoughts together. Reading it again it's maybe because I can't see where your 'bisexual' angle comes in? Reading all your posts together in context it doesn't sound like it's all about you exploring your 'bisexuality' at all? I'm using 'quote marks' cos I'm not convinced that's the whole thing, or even the main part of it? Just sounds like you want to swing with the missus involved and explore a wider world of sexual experiences, which may include bisexual ones, but not necessarily? You acknowledge yourself in your first post that you're not physically / sexually attracted to men thus far ((( whereas I am ))) so it sounds more like the 'bisexual' ((( or perhaps more accurately bicurious? ))) thing is just part of a curiosity for scenarios beyond what would be considered the norm for heterosexual couples?
If I'm wrong there I apologise of course, but I think you need to have your desires very clear in your head before you can even hope to communicate them to your partner. You have to be aware that she might not only not share them, she may be actually repulsed by them. You need to be on a pretty firm footing yourself to deal with that. Standard advice on swinging sites when people ask how to introduce their partner is break it slowly, introduce ideas into your fantasy / sexual life in a non-threatening way, see if that enables her to share fantasies she may have had but has felt unable to express up to now, see what happens. It's baiting a hook and seeing if she bites to some extent. That doesn't mean she's gonna bite or that you're gonna get what you want out of it though. If she backs off or doesn't acknowledge the suggestion it ain't gonna work.
Don't push. I've seen couples fall apart where one half tried to accomodate their partners desires and just couldn't do it. The bond between you has to be one of total trust to even think about swinging. Inviting someone else into your bed has to be a shared experience, each of you taking pleasure in the other's pleasure and revelling in it. If you ain't got that it's doomed.