The guy who knows all about women's reproduction reminds me of two CKIA I encountered when I was pregnant, both at work.
1. My boss who had the double distinction of being both a CKIA and Captain Inappropriate Conversationalist. He pulls me into his office and says, "I notice you are going to the bathroom quite a bit now that you are pregnant and I want to help." Cue my jaw dropping. I say, "I'm not having this conversation." He then says, "If the problem is constipation, then there are proven ways to handle that." I blink and say, "Yeah, we're done." I get up and move to the door. He moves in front of me and says, "No, seriously. Use popcorn. Popcorn is nature's perfect little backhoe! It gets into your intestines and just pushes the 'stuff' out, makes you all nice and clean." I'm truly agog. He then continues, "I KNOW what I'm talking about." At which point, I snap to it and say, "Why, because popcorn has helped you through your pregnancies?"
2. My assistant -- who was a college student. Oy, what a KIA she was. One day, out of nowhere, she proceeded to lecture me about the evils of modern medicine and how if I had my baby in a hospital with an OB, I was "certainly" endangering my baby's health and I would be lucky to get out of it alive myself. I told her to take her so-called knowledge to someone who'd appreciate it. Shockingly, I chose not to renew her assistantship when it came due a few weeks later. Ffwd about ten years and I encounter her and dh in a restaurant and she comes up and apologizes to me. She'd just had her own baby a few months before and had a full hospital birth complete with pain killers and she expressed her chagrin at daring to tell me how to have my own baby.