(This story is extremely old and is gutter tier trash. Please read anything else on this site over this malodorous tripe.)
(This story feels as if it is something that has been done before. However, I don't know how to begin looking around Fimfiction for a similar story. If another story that features Twilight straddling a checklist between her haunches for several thousand words exists, link me to it. I shall remove this story without argument. Also, the cover image belongs to Somepony of DeviantART. Thank you to Cast-Iron Caryatid for pointing me in the direction of it's source.)

Twilight writes a gigantic checklist. She then proceeds to have sex with it. That is this story.