The Poem Book That Shouldn't Be Seen [P1: If It Goes Up, Must Come Down]

The "Fin" is in the Chin.

Lynn Flynn, like Harley Quinn,
A villain of all kinds,
She's not like Caitlyn, Gwendolyn or Madelyn,
She's not like Carlin, Rosalyn or Carolyn,
She's not like Pauline, Celestine, Adeline, Clementine, Seraphine, Geraldine, Christine, Josephine or Delphine.

No,
She is a win,
She is in my skin, injected in by my vein,
Love her is a sin,
My head spin when I see her trough the inn,
She's thin but perfect,
It would be impossible that she have had a twin,
Since the begin I knew That she would stick her pin in the bin where my heart was,
Everyone would love to kin her,
When she's within, everything begins to din,
She will always be my queen,
Flinn the tin in my ring.

(Wait where's the meanin' in the last sentence)