LPT: Heterosexual men and women can't be friends.

Too many women don't know this, and this just causes unhealthy relationships to happen.

Plenty of research already shows this. Here's one example: http://www.scientificamerican.com/article/men-and-women-cant-be-just-friends/

The overall rules of attraction can be found at http://www.laddertheory.com and can be succinctly put as:

1. Men are always seeking sex.


2. Men seek hotter women.
   


3. A woman's intelligence or social status is nice but insignificant for men.


4. Women mostly seek more powerful men. (richer, more influential, etc..)


5. A match happens when a man's power and a woman's looks are about the same level.


6. A guy can only be your friend if he has a much hotter girl already, or if he is gay.
   

And that's it!

You will find that all relationships fit into this general pattern. You may not like it, but that is how it is.