Killing each others

Tell me please.
Why is it, that the two characters that fight against each others, ew. RurounixAoshi, DarkxKrad, FarfarelloxAya, etc..
Are always paired together?
For god sake!
They´re trying to kill each other, what of it cant you understand!?
I dont get it ( an still love it).
I am such a hopeless litlle girl. But not the only one.
But I got lost from the rael subject. Someday I´ll create a whole new world for the Mishaps of Yaoi.

Kiske and Sol,I´m just writing a Fanfiction about them in wich Kiske is old, about in his 50`s or so. They havent seen each oyher for 15 years, Kikse an Sol I mean.

These is fron the beginning of the Fan fic.

The memory never faints...

It was getting darker bit by bit. Cold wind threw the white sheet called uniform that surrounded the thin body of the man. Years had gone by without them seeing each others. Human as he was, he felt the weight of those years in his body and colour of those sunny golden hair of hes had started to faint to anonymic grey. The glow from hes greenblue eyes had faded it´s boyish glow and turned it in to a older and more wiser look in his face. But the heart was still stronger than his mind as it had always been. The cross that shimmered in the slowly dying rays of the passing sun, proved it.
He improved his slipping posture a bit. His back was aching, for the cause of those battles he had fought in his life.His worn out joints were aching.
But he didn´t want to give up waiting, he had promised to come, and he had promised to wait for him.
He tried to drive away the cold that threatened to eat away the sense from his body, like a beast in the edge of starving to death. He felt frozen even in his entrails, just there where the heat of the batlle had run warm and strong, there was only feeling in the bottom of his stomach, that wouldn´t want to move even when made to.
The air was frosty. He saw it from the steaming air of his breath. He watched the sky wich started to look like a beatiful dark cloath where those things called stars that were really planets in the sky. Twinkled their messages to the human kind. Messages they were unable to understand.
Lord had made a beatiful world for them, to the humans that had almost destroyed it, it and themselfs.
The gloves that he was wearing, were no allevation for cold freezing fingers of his, they creaked a bit, the leather in the gloves were well preserved, the man had made sure that time couldnt use its sharp little theets and eat away the dark level.
He would come, he was sure about it.

Sorry for my bad english, if any improvement were to be found tell me I´ll do my best effort to fix it.
This is only the first part, I´ll post the next soon. Hope you liked it.

End