Why do people have such a mechanical view of romantic relationships?

It's something i've noticed on yahoo answers. It seems to me that the comunication between men and women is a myth. So what happened to being friends AND lovers?Why do people have such a mechanical view of romantic relationships?
Mechanically speaking...In order for an engine(relationship) to run properly, Not only must there be fuel(passion), air(space), and spark(love), But there must be a firm foundation for the engine(relationship) to be mouted to so it doesn't vibrate out from under the hood and look for a better car to propel. Friends and lovers? How about we look at the prospect of every good marriage...A union of two folks who learned how to integrate friendship and love into a perfect union...(No marriage is perfect..but compromise makes up for that truth.)Why do people have such a mechanical view of romantic relationships?
When I think mechanical I think of cars and robots. Whats a mechanical view? Maybe communication between men and women is only a myth to you. your kinda weird.I think you need to get some kissy kissy action before you go and have some sort of a Mechanical meltdown..............