Usually on the penis. In uncircumcised men, they are more frequent on the glans (head) of the penis. Less frequently, they are found on the pubis, scrotum, groin and the perianal area. Anal warts are more frequent in receptive homosexuals, and the anal canal must be checked. A few cases of perianal warts have also been found in men and women who did not report any anal intercourse.