I have a sister I don’t know
For I have never met her;
I know that she’s fictitious, but
I can’t seem to forget her
A sister who lives in my head
Who I love like no other –
Who I would take fake arrows for
Like any phony brother
You might think that it’s strange, indeed:
Some type of new disease —
But many men, I think (online)
Have weirder fantasies
I grew up with her in the house
And it was most annoying;
For she who won’t reveal herself
It slightly worse than cloying
But she’s part of our family,
Though her heft’s less than bantam;
The sister who was never there,
My sibling, who’s
A phantom

Wow, what a metaphor!