Not too long ago there was a horse that had a keen interest in blowing himself up, despite never doing so before. So one day the horse was just wandering around when he came across an automatic air pump.
“Hmm, maybe this could be the time I blow myself up” He thought to himself, so he put the hose that was on it into his mouth, and he pulled the lever.
He started to feel the air rush into his mouth, his cheeks puffed out and he swallowed the air, letting it go directly into his stomach. After a couple minutes of this, he decided things were not going fast enough. So he pulled the lever some more, until it was at its highest pressure point.
The air went down faster and faster, and his stomach got larger and larger, and soon his legs started puffing out too. Before he knew it, he was over ten times his original size. He could hear creaks from his pleading body, but he didn’t care, he was having too much fun. The air kept going, and he kept growing until
KABOOM!
He blew up like a balloon.
Extremely obvious moral: Overindulging in something you really like/want to do is not always a good idea.

Aesop #2, Again, I'm not too good in storywriting. If popping is "Mature" or "Adult" let me know