I'm forever besotted with tits.
this is taking it's toll on my wits.
Yet, I still note with terror
the apostrophe error.
It's its, and again, it's not it's
It's fine when you're rhyming with tits
To use either version of its
And this is because
The dependant clause
Is possessive or whatever fits
It's plain as the face on your nose,
The apostrophe goes where it goes
And shouldn't replace
A comma or space
(Or tildes, as everyone knows)
Found on the internet at jokemoz.com