[ExSES]

I’m guessing his pheromones fit all of their (genetically similar) chemoreceptors. Chemistry is a necessary but insufficient requirement for long term marriage.

Or..., they were all "A Little Off?"

[Valpal1]

This is not the first set of sisters I’ve heard about chasing after the same guy. I knew a set of twin guys in high school that frequently chased after the the same girls. And brother sets that married sister sets. And mother/daughter sets marrying father/son sets.

There must be a genetically similar pheromone component because this is not a rare phenomenon.