Things I am not sure how to react to:

For me it's death and very sad/tragic situations

When my mother's father died in my grade school years. everyone wanted me to act sad and show some emotion when he passed away.
But i felt nothing. I didn't know him very well my grandmother never spoke highly of him at all, even to this day it's like he ruined her view of sexuality and men.

When a friend confides in me about someone important to them passing or being close to death, I listen but it's like i ma scared to say somethign rational about death (like "it's part of life", etc.). I haven't had to deal with death so close to me yet. My other grandfather i never met, he died when my dad was 19.

Both grandmothers are still alive, and i grew up with one, so that may really give me a jolt, when it comes. The only death that ever thrown me off was when i went to a wake for someone from my church and stumbled upon the wake for a friend and co-worker that i was really cool with. That had me standing still and shaking.