Okay, so an update on this fascinating case. Our friend now has his own regular live-in harem at home. His babysitter, Jenny lives with him, and her best friend, Josee, also seems to hang out with her quite a lot too, and of course a bunch of other girls from college who come by from time to time. Well, it seems he had a bit of a scare recently, both Jenny & Josee were late on their periods! Sweating bullets time! He was thinking he got them both pregnant, but instead both girls did have their periods, a little late -- but at the same time! It seems the two women are hanging out so often together that they've now started to synchronize their periods.
There's some biological evidence that women who spend a lot of time together, somehow end up synchronizing their periods with each other for some reason. Not sure why, pheromones maybe? Mothers and daughters living in the same house. Girls in university dormitories. And yes, even women in a harem. They all seem to have synchronized periods. So our friend has his own little human biological petrie dish running. :biggrin2: