Haiku how?

Do I follow form

Or formulary? Is 5 then

Seven and 5 to

End the verse enough?

Or to start it up again?

Do I follow form?

Haiku wow

So short and yet still
So stubborn and insistent.
Do I follow form?

My haiku

Why five, not three, or
Four. Why seven, for me, a
Magic number, not
Nine or eleven or
An even ten an odd one
Not one per se, but
A shorter or a
Longer number like thirteen
Why five, not fourteen?

Why? Am I missing something?