What does cock mean in gay porn?

What is cock?

Considered a vulgar expression used to describe the penis. Though today is quite an accepted term for the male sex organ.

Definition

Derived from the Latin 'coco' and later Latin 'cucurru' which referred to the imitative sound of a rooster crowing.

Middle English it referred to a faucet. From the 15th Century it referred to a tap, spout, or penis. It was around the 18th Century that is become more widely known for being a penis.

The male reproductive organ, cock is a slang term commonly used today.

Noteworthy: Between 1920 and 1940, African Americans used the term to refer to a woman's vagina. This change in definition was most notable at the imaginary Mason Dixon line, that separates the Southern US from the North. A border state, Missouri used both definitions.

A 'cock opener' referred to the penis.