Answer:
There is someone, and there is always another, for without the other, there wouldn't be one
What can touch someone once and last them a life time?
Two horses, swiftest traveling, harnessed in a pair, and grazing ever in places. Distant from them.
A leathery snake, with a stinging bite. I'll stay coiled up, unless I must fight.
I am what remains when nothing is left.What am I?
Written on with words of white, Has the color of the night, Is the teacher's best delight, And a student's daily fright