Male primates have a pendulous penis and scrotal testes. The male's testes may also be visible externally from scrotal swelling. It also exists deeper through the scrotum where it is called the scrotal septum. Additionally, surgical treatment may be helpful for issues related to scrotal elephantiasis and hydrocele. Other scrotal tissue forms the labia majora. Wedgies, especially when performed on males, can be dangerous, potentially causing testicular or scrotal damage. Penile skin may have similarly enhanced absorption characteristics relative to scrotal skin. The skin flap is sometimes combined with a scrotal or urethral flap. The testes descend into the scrotal sac between the sixth and 10th week. Genitourinary tumors may present with hematuria, urinary tract obstruction, and/or a scrotal or vaginal mass. These structures are the future scrotal swellings and labia majora in males and females, respectively. In men, the genital branch supplies the cremaster and scrotal skin. The scrotal skin of most male lemurs has scent glands. All seven men died from scrotal infections after vasectomy. It is sutured to the scrotal tissue or enclosed in a "subdartos pouch".