'little bridle') or frenum, is a thin elastic strip of tissue on the underside of the glans and the neck of the human penis.

[7][8] The frenulum is a highly vascularized strip of mucosal tissue on the ventral side of the glans and the neck of the penis.

The two sides of the lamina do not fuse in the midline but remain separated by a thin septum of mesenchyme that will create the preputial frenulum.

[15] The role of the frenulum in penile erection has been studied in cases of men with short frenula and premature ejaculation.

[8] Treatment with lengthening or reconstruction of the frenulum in uncircumcised and circumcised men was reported to have positive results in satisfied intercourse, prolonged erection and time of ejaculation.

[16][17] For individuals with spinal cord injuries preventing sensations from reaching the brain, the frenulum just below the glans can be stimulated to produce orgasm and peri-ejaculatory response.

Frenulum breve may also contribute to frenular chordee, where the glans is pulled toward the ventral body of the penis.

This procedure involves a (partial) incision of the frenulum and realigning the edges to gain more length.