Anal: Refers to sexual activities involving the anus. This can include anal intercourse or any kind of penetration in that area. It's a popular fetish for many people due to the intensity of stimulation provided, and is usually associated with intense pleasure for both partners involved.
Fetish: A fetish is a form of sexual desire in which gratification is dependent on an object or body part, often not directly related to sex itself. In porn, a fetish can be anything from latex clothing, bondage gear, specific body types, to more niche interests like feet or role-playing scenarios. It's a term used to describe the object of one's sexual obsession or interest.
Twinks: Twinks are young, slender men who usually have a youthful and innocent appearance. They may be hairless or have minimal body hair, and often have boyish features. This term is commonly used in gay pornography to refer to younger-looking or slim male performers, especially those with a more feminine appeal.