The belly button is a must for all humans, as the placenta and umbilical cord are needed to feed the fetus. It is cut at delivery.
No.
All humans have a belly button, which is formed when the umbilical chord is severed and tied off after childbirth.
Hold down all da bottons.
before birth, the fetus is attached to the placenta (which feeds it) by the umbilical cord. when the baby is born, the doctor cuts the umbilical cord. a few days later, the piece of the umbilical cord that was still attached to the baby falls off the belly, leaving a small rise in the belly: the belly button. of the next decade and a half or so, the rise in the belly sinks in and becomes a small cave.
no just bottons
press all the bottons
ye
Either.
beer
twiches and bottons
Stainless steel
right below your belly button.