What causes us to have different kinds of belly buttons..?

Answer:
it depends on how your umbilical cord is tied and cut at birth
Answer:
I have no clue. Probably just genes. My mom has an outie and my father has an innie but me, my sister, and one of my brothers have an innie. My other brother has the only outie besides my mother
Answer:
It depends on the way they tie the umbilical cord when they cut it after you’re born.
Answer:
It depends on how close the doctor cuts the umbilical cord.
Answer:
Genetics.

Same reason we all look different.

Answer:
Depends on how your umbilical cord is cut & how its tied
Answer:
It depends on the Dr. and how he ties the knot.
Answer:
ur mum/dad can select where to cut ur umbilical cord when u r born, they decide wether u have an inni or an outti
Answer:
bc ur mother hates u and i porked her