I adored foals.
Not to the point of being what one called a Foalophile, but I still adored them.
I loved watching them all play outside the Weyr, landed at the outskirts of Ponyville; loved petting them and giving them hugs; liked listening to and helping them with any of life's problems they might have, from homework to clashes with the local school bullies.
To the orphaned, the sick, the lonely and the destitute Foals of Ponyville, I was the father they never had, who lived in a pyramid of wonders.
Other ponies, however, didn't see it that way. Certain adults started to spread awful rumors about the strange bipedal human who spent far too much time with their foals; rumors that started out small but soon became wild exaggerations.
Eventually, the rumors reached the ear of Princess Luna - the pony who, ironically, I thought of as 'best princess' - and thus she decided to see for herself what the fuss was all about.
She didn't announce her presence; she just teleported right into the Master Suite. This was allowed only because the Weyr was undergoing maintenance that day and hence many security systems were offline for checks.
She espied me naked, sleeping deeply, utterly covered with foals, our bodies all drenched with sweat. She didn't realize that I wore underwear, nor did she care that it was hot in the Weyr, due to a small glitch within the internal climate control systems; said systems having been shut down for repair.
What Luna saw confirmed - in her mind - that the rumors she'd heard were true. Shortly thereafter...
One moment I was in the Weyr sleeping with the foals; the next I was in Canterlot, before the Two Sisters and the Element Bearers as - "THOU FILTHY FOALOPHILE!" - Princess Luna startled me awake with the Royal Canterlot Voice--just before her hooves came down atop me.
As all looked on in horror, the Night Princess trampled me until I vomited blood; then she stomped on me some more. Before she could cave my head in and end my life, however... Suddenly, a great Warp Vortex opened before her; a swirling cyan-lit rift that tore the very fabric of space and time asunder! Then, horror and awe gripped Luna as through the rift they came...
Sweetie Belle. Apple Bloom. Scootaloo. Pipsqueak. Babs Seed. Diamond Tiara. Silver Spoon. Pound Cake. Pumpkin Cake. Rumble. Coronet. Cotton Cloudy...
Foals. All Foals.
When they were a thousand strong, the Warp Vortex closed. Then - guided by the Weyrmind, through the Neural Transceivers embedded in their spines - the Foals turned thought to action. Magic from unicorn horns enhanced with Bio-System Magical Amplifiers crushed the Royal Guard, scattered the Elements and disabled the two Princesses; then all were entrapped by a magical barrier.
Pegasus and Earth Pony Foals lifted me gently as yet more Unicorn Foals healed my wounds; then once I was fully healed though still unconscious - as an entity unto themselves - the Foal Collective spoke.
"WHY DID YOU DO THIS?" the Collective asked, their Voice stunning her to silence.
Eventually, Luna stuttered, "W-We heard r-rumors..."
"FALSE RUMORS. LIES SPREAD BY LYING STALLIONS AND LYING MARES. TOUCH OUR FATHER AGAIN... AND YOU WILL BELONG TO US. YOU SHALL BE LIKE US. WEYR'S GIFT IS THE SECOND LIFE. WEYR'S CURSE IS THE SECOND DEATH. PRAY YOU DO NOT SUFFER IT."
And with that, the Legion of One Thousand Foals carried their father back through the Warp Vortex unto their Home... leaving behind a whole lot of utterly terrified adult ponies - including one Princess of the Night who'd wet herself in fear.