The white object at the coronal groove of the glans is due to the secretory function of the inner plate of the foreskin and the mucous membrane of the glans. The inner plate of the foreskin and the glans are like skin and have the function of secreting sweat glands and organic substances. If the foreskin is too long and the foreskin is not turned over for a long time to be cleaned, the secretions will collect at the coronal groove. The actual fact is that you can find a lot of people who are not able to get a good deal on a lot of things. The way to prevent this is to frequently turn up the foreskin and clean it or perform circumcision.