Karyn grabbed one of the few papers first as she was closer to the bed. Reading more into the change they're in, she went and discovered more than she anticipated.
The "Penis" now provides estrogen which explains why her body reminds relatively unchanged but it also has enough testosterone to impregnate men. The thought alone got her member rising up. She quickly went and pushed it down but got pain when she can't seemed to.
"Don't push it down too hard, just let it stay up.. Cover it with something will you?", Jon had gotten up from floor, grabbed the pillow by the bed side and slapped it right at Karyn's crotch which made her wince in pain having to hit her balls.. "Oww!! Jon, my balls.. ", Karyn uttered a sentence she didn't expect to say which got her even more weird thinking about it.
"Oh ri-right... ", Jon apologizes, also feeling weird about it. He knows he's feeling a little bit wet down under, seeing her have a thing that he so fetishized was quite a wet dream come true.
Karyn sat down on the bed, the pillow to shield her rod from being too obvious. She continued reading more of the change. Jon also awkwardly sitting next to Karyn, took a paper from the set and started reading into what's changed.
Jon read that women were now biologically stronger than men but throughout history not much has changed as women were more home bound and tied to their motherly duties of caring for the home.
Jon looked back at Karyn only then noticed that she was maybe a foot or so taller and her general body type was bigger. He only turned back to the paper to read more.
While such is the case, many historical events changed due to this shift. Many nonexistent nations propped up and many old countries remained as is. It was due to the fact that women were now able to fend for themselves and are generally stronger than men.
The paper explained more boring facts about the myriad of conflicts that happened which Jon hardly cares about until he got to the anatomy that explains why they're are stronger. It so appears that they have enough testosterone to enforce such change..