What can they possibly get out of it besides the obvious reason?
Most Helpful Opinion
Happiness, they hope.
What constititue people's happiness though? Long answer for some, shorter one for others. Control freaks wouldn't stop until they can control you like their TV. Money freaks wouldn't stop until their last breath. Sex freaks wouldn't stop until they can't do it no matter what pills they take.
I would define a beautiful relationship as one where two ALREADY happy people, who are ALREADY highly compatible, meet. I have seen a couple of these to know if you work on it, you would get one.