Genital tucking (also known simply as "tucking") reduces the appearance of male genitals by positioning them a certain way. The testicles can be tucked into the passage through the muscles of the abdominal wall (inguinal canal). The scrotum and penis may be secured between the legs towards the buttocks. Sometimes both are done. The genitals are held in position with underwear, tape, or compression underwear used for tucking. This type of underwear is called gaff.