I'm very disappointed in poem_for_your_sprog for almost understanding this point, and then immediately making the same mistake she was calling out
'I have to sort my books!' she cried,
With self-indulgent glee;
With senseless, ~~narcissistic~~ pride:
'I'm just so OCD!'
'How random, guys!' I smiled and said,
Then left without a peep -
And washed my hands until they bled,
And cried myself to sleep.
I think the "I" in the poem has genuine OCD and the "she" in the poem is using it inappropriately.