Man, the movies always make eating a heart seem easy. They're actually tough and chewy. By the time you're done, you've almost worked up an appetite again just from the sheer amount of work you put into eating them.
You do feel a little something, though, like a flicker of remembrance. Perhaps the stories about hearts containing memories are right… or eating hearts just reminded you of something. Neither's really a great option.
You've regained 75 energy!
You've earned 11 XP in Perception
You've earned 7 XP in Reflexes
You've earned 48 XP in Strength
You've gained Strength!
You've earned 14 XP in Will
Absolutely nothing out of the ordinary for 20 hearts in one go.
Edit: Blast it! Put on the bone scepter and a crude bone mask, but forgot to turn on ghoultouched again! Augh. So it may be related to ghoulishly devouring if there is anything.