What factors make it likely that two people will become close friends?

[Soheil]

Why two people become friends/close friends?

It's because they share more characteristics than other people? Is it a relevant factor? Or you think its irrelevant?
Do you think there are some specific factors at all?

Please explain your view...

Thanks.

 

[blastoff]

Normally because I wanna do her.

 

[Skull Pilot]

Normally because I wanna do her.

I'm of the mind that it's extremely difficult for a man and a woman to be very close friends
the sex thing always gets in the way

of course I am speaking of hetero men and women