A: I had this crazy idea the other day. There will eventually come a time when people live up to 200, 250 years, right?When that day comes, I think marriage will be negotiated. So, for instance, when a guy proposes to a woman, "Will you marry me?", the woman asks "How many years?". And the guy says, 40! and the woman is like, "35!". You know what I mean? B: That sounds cray but plausible, I gues..