It is a part of our covenant with HaShem, the creator.
We are not told in the Bible about Circumcision and the Midianites. You might find something in Midianite history.
Circumcision is a good idea if the owner of the penis concerned has an inclination to not wash regularly.
No, the penis is not shortened by circumcision.
No circumcision is not beneficial to health. on the contrary it is harmful.
No, penis size has nothing to do with circumcision.
Circumcision has nothing to do with infertility.
When you develop SERIOUS conditions where circumcision is the Only option.
The circumcision scar is permanent and it can not be gotten rid of.
No, it is nothing to do with it. Circumcision is the removal of the foreskin from the penis.
Surgery can extend, but the surgical procedure that does it is not called circumcision.
A Jew that does circumcision is called a Mohell
A circumcision certificate -- a document given to the parents of a male Jewish child after his foreskin is snipped off during a circumcision ceremony