Will talking to people help you live longer?
Yes, I'm still alive because I talked to a doctor. Even just talking to regular people, though, can help maintain stable mental health, and increase your life span.
Not that I know of. But I have heard that laughing makes you live longer, and people can make you laugh. So, in a WAY, yes.
If what they say is funny and you laugh a lot
Yes, talking to your dog also helps.
Absolutely; Especially when you gotta talk your way out of being mugged.