sportsherald. 2 votes Vote for this answer. Another name for a wing dam is a groyne: 'River groynes (spur dykes, wing dykes, or wing dams) are often constructed nearly perpendicular to the riverbanks, beginning at a riverbank with a root and ending at the regulation line with a head.
The foreskin (also known as the prepuce) is a portion of skin on the penis that covers and protects the tip of the penis, also known as the glans. It can be a tough world for a glans -- there's abrasion from undergarments, cold winter weather and dry air.
At birth, virtually all males have a glans penis covered with skin. In almost all of them (96%), this skin is still attached to the glans like normal skin. Only 4% have a fully retractable foreskin at birth. The implications of this finding are enormous. Any doctor or other person who inserts a probe into this space between the foreskin and the glans thinking that he is breaking adhesions is mistaken. Anyone who attempts to forcibly retract the skin is tearing the skin off an extremely sensitive organ.