Pretty sure it’s genetic. I used to get so tickled at how deep my dad’s belly button was- I could sink almost a whole Q-tip in it. Now, as an adult, my belly button is just as deep.
I have also seen a few outies that are shared by mother and daughter/ father and son, etc.
However, supposedly, it all comes down to whether a newborn had a bit of space between their abdominal wall and their skin- if they don’t, then they get stuck with an outie. Outies only happen in 1 in 100 people.
Still, there’s got to be some genetic connection to this.
Pretty sure it’s genetic. I used to get so tickled at how deep my dad’s belly button was- I could sink almost a whole Q-tip in it. Now, as an adult, my belly button is just as deep.
I have also seen a few outies that are shared by mother and daughter/ father and son, etc.
However, supposedly, it all comes down to whether a newborn had a bit of space between their abdominal wall and their skin- if they don’t, then they get stuck with an outie. Outies only happen in 1 in 100 people.
Still, there’s got to be some genetic connection to this.
[https://blogs.webmd.com/from-our-archives/20110523/the-ins-and-outs-of-belly-buttons](https://blogs.webmd.com/from-our-archives/20110523/the-ins-and-outs-of-belly-buttons)
Oh and apparently, an outie can become an innie, with plastic surgery. =)