hmm....
I'm very tempted to say that's coincidence...
But I really wouldn't be surprised if it wasn't....
After all, mercury poisoning is a very strange way to go...
...
Personally, I think things just turned out that way. The team's sense of humor, coupled with convenience (and perhaps a subconscious need to "stand out") led to a lot of design and plot elements that when colelcted and viewed as a whole give the game a very female-oriented vibe...