Haha, yeah, I don't blame you. Most people avoid the topic like the plague
Yes, I think I remember reading about how men with BPD behave differently to women, but don't remember much of the way they do so. I'm pretty sure I know at least one person with BPD, but they're female. You can tell me more about the men if you'd like
I don't know much about Bipolar, and find it confusing to spot in others. I don't know whether it's because I don't know enough about it, or if I haven't met enough people who are bipolar, though one person has admitted to me they've been diagnosed. In saying that, they appear quite normal every time I've seen them, so it must be rather mild. I do have a professional relationship with her though, so have not seen her in a 'friendly' kind of social situation.
What kind of developmental delays do you work with? I imagine there would be a broad spectrum of conditions that can affect many different factors.