Because

I'm a feisty thing, faster than most would want to know, these
tires, seen some tread come and go, you know don't you, know
where I've been sitting, I can fight, raise up arms make the
stance, come on you fuckers! as loud as the best of them, you
didn't say nada did you,  just swept in, you will always sweep in
and I will always stand by your side, because you know don't
you, I'd show you but all you'd do is take my hand, kiss my
cheek and take me away with you like the last time. because you
know, happily lost in you and our immediate as the world turns
that little bit slower, I'm a hero just like you, battle
scarred, wanna see them? see where I bed my sorrows down before
I finally lay with you.  
let the wars continue, the life of every living organism on this
spinning rock come and go with their daily routines, I'm here
for us, fuck anything else, watch me bed them down for the last
time, come.. come lay with me old man, take me away into the
night-time for me to fight with you, bed some of yours down too...