"A new and highly virulent sexually transmitted infection (STI) was observed. It afflicted roughly 97% of the teenage population (both town residents and students from a private boarding school) of the locality, over the course of less than two weeks. Findings vary from individual to individual but were indicative of a Poison Joke-aided mutation of the bacterial strain."

Excerpt from:
"An Epidemiological Case Study of a New Sexually Transmitted Infection," in: Journal of the Royal Equestrian College of Medicine, V924(2), P. 145-203, by Redheart, S. Glimmer, T. Lulamoon, Zecora, T. Hugger, Cadance, and Cheerilee.

This is tagged [Mature], [Comedy], [Sex], [Slice of Life] but not tagged [Porn]. Calibrate your expectations accordingly.

Disclaimer: They're older. Precisely how much older is left for the reader to decide for themself.

I thank the pre-readers, but for their benefit, don't name them.