The perineal branches of the posterior femoral cutaneous nerve are distributed to the skin at the upper and medial side of the thigh

Thigh

In humans the thigh is the area between the pelvis and the knee. Anatomically, it is part of the lower limb.The single bone in the thigh is called the femur...

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One long perineal branch, inferior pudendal (long scrotal nerve), curves forward below and in front of the ischial tuberosity, pierces the fascia lata

Fascia lata

-Thickness:It is an investment for the whole of the thigh, but varies in thickness in different parts.Thus, it is thicker in the upper and lateral part of the thigh, where it receives a fibrous expansion from the Glutæus maximus, and where the Tensor fasciæ latæ is inserted between its layers; it...

, and runs forward beneath the superficial fascia of the perineum to the skin of the scrotum

Scrotum

In some male mammals the scrotum is a dual-chambered protuberance of skin and muscle containing the testicles and divided by a septum. It is an extension of the perineum, and is located between the penis and anus. In humans and some other mammals, the base of the scrotum becomes covered with curly...

 in the male, and of the labium majus in the female.

It communicates with the inferior anal nerves

Inferior anal nerves

The Inferior rectal nerves usually branch from the pudendal nerve but occasionally arises directly from the sacral plexus; they cross the ischiorectal fossa along with the inferior hemorrhoidal vessels, toward the anal canal and the lower end of the rectum, and is distributed to the Sphincter ani...

 and the posterior scrotal nerves

Posterior scrotal nerves

The posterior scrotal branches or ""posterior labial branches"" are two in number, medial and lateral. They are branches of the perineal nerve, which is itself is a branch of the pudendal nerve...

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