@StealthAria:
I consider souring the mood a bit (and recovering from it, by making her forget about it) as the lesser evil, than weighting the whole diner with the deaths of people you knew.
[...]Even if he tried changing the topic, she might remain curious about it and try looking into it on her own.[...]
He didn't even try that, even if she only
might have done that. And if she did, that would have just lead back to the situation in the beginning. In that case he still could have gone with the not so smooth
"I'm sorry, but that isn't a light hearted topic, we are about to touch. Maybe it's for another time." That doesn't really dodge that bullet, as it's just a tad milder than telling her about that people of his former party died itself. In that case, if she really would have insisted, he could also have told her about it and I wouldn't mind. What I mind is, he brought it up right away. (Looks like he actually wanted to talk about it with somebody. But >at least I< think it still isn't the right topic for a first date.)
[...], if it's something that you can talk about, you should.[...]
He certainly can take about it (He doesn't need to feel ashamed of the topic and he is in a psychological condition, in which he is ready to talk about it.), but should he? As a stress relieve, it's alright. As a topic on a seriously meant date, not so much.
And NEVER lie about it, even if it's to avoid hurting her; the more serious the matter, the bigger the blow to the relationship it is when she finds out, and she WILL find out.
This is really valid reasoning and could lead to a serious blunder.
'Ah, he/she isn't trusting me at all.', but it all depends, if the other party recognises it as an attempt to lie to them or not. Take my former example:
Ashley: "Did your party ever ran out of food. A parties survival instinct kicks in then."
Schwarz: *stern face* (not a threatening one)"That never happened." *melancholic face* "Whatever." *gentle smile* "Tell me about your home town."
"That never happened." is a blunt lie, but the way it is delivered implies, something is up with that. The possibilities to interpret that, are seriously limited. Was he offended? Did he lie, to change the topic for example? The point is, the other party is well aware, that there is more to it.
When does a lie begin, and where does it end? Somebody, who only state true facts, but intentionally fails to tell certain others, to create a false impression of the matter at hand, is lying. Someone asked a question and that person reacts nervous, embarrassed and doesn't seek eye contact in an over-the-top manner, so it IS an intentional behaviour, and then tells a lie ("O-Of coooourse I took out the trash!"), made sure everyone got, that he/she is telling a lie, and therefore isn't really lying.
As long as it is a honest mend communication device and the other party knows that, it's fair an square in me book.
That all only reflects me position on the matter, and shouldn't be an attempt to claim that everyone thinks (or should think) the same way I do.
EDIT: Ohboy! Wall of text again. I'm sorry. I'll try to keep those to a minimum in the future.
EDIT2: This discussion is fun! ?