Inability to retract the foreskin in childhood should not be considered a problem unless there are other symptoms. From Prehistory to the Twenty-First Century". A more feasible hypothesis is to regard them as a juvenile phenomenon, perhaps serving to protect the penis until the onset of puberty reveals its sexual function. Dorsal veins of the penis. Steele J Urol ;
From Prehistory to the Twenty-First Century".
Tight foreskin (phimosis and paraphimosis)
Congenital Anomalies of the Penis — Springer. Science and Practice, Morris and Krieger wrote, "The variability in foreskin size is consistent with the foreskin being a vestigial structure. Foreskin fibroblasts have been used in biomedical research. Topical interventions for genital lichen sclerosus. This is perfectly normal for about the first 2 to 6 years. Surgery may be needed if a child or adult has severe or persistent balanitis or balanoposthitis that causes their foreskin to be painfully tight. It has been found that larger foreskins place uncircumcised men at an increased risk for HIV infection  most likely due to the larger surface area of inner foreskin and the high concentration of Langerhans cells.