When I was 16 my mother told me that "real women don't actually give men head." Nine years later, just before my mom and step-dad got married, I took her to a sex-boutique and broke the news. "Mom, it's not just porn stars and prostitutes who give men head. REAL woman do that and your new husband might be grateful if you consider it."
She laughed. and laughed. and laughed.
Apparently my mom isn't quite as sweet and naieve as I thought. She just didn't want to encourage her free spirited daughter to go out and blow every boy in town.