Tombs are very lonely places.
The thing crouched, shielding itself from the darkness. It was always looking inwardly, looking at its own heart ... well, whatever that unmoving, rotten chunk of tissue was that passed for a heart. Whatever it was, the thing saw that it was lonely.
A child brought a light into the tomb.
The rays strayed into the thing's inward gaze. It screeched. It froze, horrified. A thing more terrible than darkness!? Its heart was trembling. Its heart was trembling? How strange. Curiosity edged its terror. The thing peeked over its knees. The light caused it some discomfort, but it could discern the child.
A child. A child. Delicious.
Foolish heart, why did you tremble?
It did something it hadn't done in an eternity. It moved. A slow, creaky rise at first, then a steady, careful pace on dusty limbs. The poor child never noticed it approached. His wailing and weeping were never heard by a single sympathetic soul.
During the thing's profane feast, the child had dropped his light. The thing just then noticed it, and gazed at it some. How did it instill fear so? The thing had the strange sensation of embarrassment. But it puzzled over it some more.
Another dusty, rotten thing had approached to look at the light.
The first thing looked at the second. But each of them thought themself alone in this tomb?
A third came.
Then a fourth.
Then a fifth, a sixth and a seventh.
The first realized that he still had a trembling heart, and the most pleasant of tingling sensations. But that sensation wasn't in his heart, but it felt even deeper inside its tattered innards. It thought it was possibly a second heart.
The others discovered second hearts too. Their hearts wanted to join, and so they did. Crumbled flesh felt the same zeal as they did once in forgotten, living years. They sought any orifice -- chest cavities, eyeless eye sockets, mouths lined with ripping teeth. They were caught in a happy delirium of destructivelove. They assaulted, ripped, inserted, moaned, screeched, stressed their limbs to breaking. All was left was a sated pile of dust, bones, and organs. Silly redeads. If any of them had bothered to look around before, they would've realized the tomb wasn't lonely after all.