They will never understand that the public demands silver foxes. Mommies are in, babygirls are so last decade.
Jokes aside I'm more concerned about the joint pain.
Ideology
joined 3 years ago
Did anyone call you an "old soul"?
Sounds like you may want to go with electrolysis. 
They need ANOTHER base???
Me when I get another gray hair:
I love my job I love my job I love my job I love... 
I have never played Fallout: New Vegas. 
If neither of you have done poly stuff before, there are a lot of potential landmines for jealousy to spring up in this particular scenario. It's important to not catastrophize or minimize jealousy, but treat it like a signal that one or more parties anticipate imbalances. To work through it you have to consider the needs of all parties involved. Ensuring attention is spread evenly takes practice and effort.
To your second point, you're doing well by not acting on impulse and taking the time to think about who you are. What I would suggest is to open your mind to the possibilities, and simulate where they might lead. Your partners will not be predictable. You could find someone who neatly falls into your criteria and is "safe" in that regard. Or you could meet someone who develops impassioned feelings for you over time and, you might find you feel the same way about them. But what would you do if they have desires and you want to rein in it? How would you deal with that friction?
When dealing with people you can't lock them into a mold of your ideals. More relationships = more variables to contend with. You may have to find yourself coming to terms with your libido while looking someone else in the eyes, whether you like it or not.
Nice! I would still rec the other stuff for thoroughness if you're not familiar. Poly in LTRs tends to be about communication, communication, and more communication.
Losing to hubris would be a delicious way to signal the US's decline of soft power.
Hello comrades. Have you ever heard of the hit track Fuck the Cistem by SOAD?