Soo, PMS. How’s that going?

My 25 year old boyfriend just asked how my PMS is going. He soon after admitted that he didn’t Know what that was and looked it up. Oddest question lol. He has sisters and everything but was unfamiliar with the topic. Now and then I School him on the female body. B4 me, he thought a woman’s period was a one day thing and she just sits on the toilet for a while and is finished. I CANT MAKE THIS UP😳.Out of every guy I’ve dated (younger) he is the only one this unknowledgeable about the female body, so I make it a point to educate him🙂 and he appreciates it. We’ve been together for over two years and have been friends since 2009. I love this guy, but I’d really like to know: Is his cluelessness on PMS, and the female anatomy this common at this age? Anybody else have an adult bf out there who didn’t know what a period is or understand the process of conception?