How on earth would that be selfless? Not only would I be leaving my husband but then my kids would be without a mother, I would pass away before my parents, and all of my fur-babes would be without a proper owner. I would be leaving everyone behind, other people that either depend on me or would miss me surely.
Sure, that stranger could or could not be grateful that I gave my life for them, but my family and friends are more important. There’s too much in my life to leave behind for someone I don’t know.
A stranger? probably not. I would sacrifice my life for someone whom I would not care to live without. That being said, I would try to save someone if I could, I just wouldn't blatantly sacrifice my own life for a complete stranger.
I would absolutely hate to die in the process, but yes, I would sacrifice myself for another. If I have to lay my life down, I'd really prefer it be for a loved one. But that being said my loved ones all know me and they know it just wouldn't be me if I didn't try to help someone in need.