"Live with a man 40 years, share his house, his meals, speak on every subject. Then tie him up and hold him over the volcano's edge, and on that day, you will finally meet the man." Sounds like fun.
On the other hand, what sort of (I need to watch my language) would do that to somebody they have known for 40 years? Not someone I would want to "meet."
With regards to littleguru's original post, you might be surprised how many relationships between men and women have very little to do with love at all. Once you figure that out, you'll appreciate the relationships in your life that involve love even more.