There are only two genders in Equestria, futanaris and males. Not even Celestia remembers a day that a futa pony wasn't rutting a colt. The only problem is the major gender imbalance. Some herds have seven futas for one colt. Unfortunately, this leaves romantically shy ponies like Twilight Sparkle out in the cold.

Luckily, Twilight has a spell to fix that.

Hundreds of thousands of miles away, a young man is being chased through the dark and dim alleys of the Lunar Colony.

((warning, overflow of futanaris. Multi futa on one guy. Warning, this story will have two very different tones, euphoric and grim.))

((Also, consider that "male" may just be an approximation or a carry over from a ancient time before futas. Just because it doesn't have a vagina doesn't mean it's male as we know it.))