Yes. You never know if they can die or the world would end. I mostly think it's death that COULD happen to them. So I give her/him memories to remember.
I don't, I never really think about it, I'm 21 and I'm at the age where I feel like me and everyone I'm close to is invincible. But you bring up a good point, I've lost a couple people I'm close to in real life, and I wonder every now and again what it would be like to talk to them.