Rob Gronkowski -- Reads 'Gronking to Remember' ... Let's Talk 'Butt Cheeks'

#Amazing.

Rob Gronkowski just read a passage from the erotic novel he inspired ... "A Gronking to Remember" ... and it's ... it's so Gronk.

The line -- "In front of the entire country, Gronk’s spike impacts right between my buttcheeks."

Definitely the best thing that happened at Super Bowl media day in Arizona Tuesday.

Of course, the novel (written by Lacey Noonan) made headlines when it was made available on Amazon.com.

And if you're still thirsty for more ... here's Gilbert Gottfried sharing a bit more. Enjoy.