We, are celebrating lgbt+ at work right now, I found myself in the position of having to explain to older staff what this meant.... The lgbt part was easy it's the + that caused problems as I don't know all the different groups.
I basicly ended up saying all that matters is if you like the person, that they are good and nice to you.... Its very difficult trying to explain + to people that don't even know what a persimmon, mango or sweetheart cabbage are! (not that I'm describing any lgbt+ as fruit & vegetables, you all know what I mean!)