You are spewing bullshit out of your fingers.
You stupid cunt of a brain mentions the 19th and 20th century when talking about MEDIEVAL marriages? You stupid idiot.
It did became a bit more common during the victorian era, mid to late 19th century. But during the medieval and most of the early modern period, women who slept around were severely punished while men weren't.
Also, no, men's faithfulness was not as closely watched as women's. For example, women could VERY RARELY divorce by initiative, even if they had proof of their husbands cheating. Men, however, almost always could divorce if they found out they were made cuckold of. The woman would then be left in disgrace while the man would just marry another person.
Stop talking bullshit, don't get your history lessons from trannies and sluts on twitter.