ROTFL...WOW. I have 3 cats that are inside with me and sleep on top of my covers in my bed every night and have for over 5 years now. I just had my SECOND child in Feb 09 and have never heard of that or had a problem. It's more likely a way to scare you so you don't let the cat sleep inside. Some people don't like cats or to have to clean up all the cat hair. Plus, how is hair going to wander inside you if you are wearing underwear and pants! Unless you are doing things you shouldn't be with the cat, then it's just a joke or there's another reason. Some parents find it easier to make up something rather than to just come out with it or say no. It's not right, but it happens. If you are really worried, as a doctor and better yet an OBGYN. If you want to scare your dad back, just tell him: Wow dad thank you for being so protective of me...now I'm kinda freaked out, do you mind to schedule me an appointment with a gynecologist for an exam?" This will scare him, cause one, men don't want anything to do with a girl doctor cause that's too embarrasing and two that will cost him money. That should take care of that problem lmao! Good luck! OH and the only way cat hair is bad for you is if you have allergies to cats. My kids are healthy and fine. My husband and I are healthy and fine. Aslong as they are kept up to date on shots, flea meds, baths, etc...you're fine.
myself: mother of two humans and have 3 cats lol