Barbie Head Without the Knob

Remember when you were a kid and played with Barbies? There was always an incident, maybe twice a year, where her head would pop off and you'd lose the knob that attached the head to the neck and allowed her to turn her head with ease. "Hey, what's all that commotion over there?" or "Aw, you are so cute, Ken." You could turn her head or tilt it just a bit - as long as you had that knob. Once the knob was gone you could only reattached the head by pushing it onto the neck and something would happen and air would get inside and the inflate Barb's head and all of a sudden she would look fat, or like she just got her wisdom teeth out. Since I've retired from my Barbie playing days, I've found that there are a lot of people in this world who look like they've lost the knob that attaches their head to their neck and therefore have the constant look of swollen Barbie head sans knob.