I've been turned on by beautiful hairy mature men as long as I can remember, but it's not so much death that fascinates me as what happens when you die. Especially dying by violent means (as a warrior killed in battle for instance, but being a murder victim ranks as high to me) has never failed to get me off.
I've no idea where this comes from. My very first orgasm (which I remember vividly, I was in my early teens) was when I fantasized about James Bond killing an enemy spy (and I didn't even touch myself!).
Actually (sorry guys, I guess I'm not a true necro), I don't think I'd ever mount a guy who's already dead, but having sex with someone still alive when we start, and then either be killed myself or experience that someone kills him (murderer: me or some outsider): this fantasy is my hottest for over 25 years now.
I'm very grateful to CDG, because it allows me to satisfy this part of my personality that I obviously can't show IRL.