It is impossible to say exactly which and how many fetishes there are. Because there are millions.
There is no definitive answer to this question as it largely depends on what people are interested in.
Roughly speaking, we humans can "fetish" almost anything. From body parts like feet and hair to objects and materials like denim, leather, latex and even plastic! The possibilities are almost endless. So if you can think of it, it probably exists.
Although there can be some social stigma associated with fetishes, they can also be incredibly fun and enjoyable.
On this website you can find my large online list / encyclopedia of all kinds of fetishes: FETISH LEXICON
Here is a selection:
Excrement
Koprofili, from the Greek kópros meaning excrement, is a sexual fetish that involves sex with or exploration of excrement. That
Stuffed toy animals
Plushophilia, commonly called plushophilia or plushies, is a form of kink and fetishism involving an attraction to teddy bears /
Cold
Psychophilia (or more correctly “psychrophilia”) refers to a sexual fetish in which the individual is sexually aroused by being cold or
Zoosadism
It can be both a physical and psychological act. The physical part involves inflicting pain on the animal, while the psychological part
Trees
Being sexually excited by trees or e.g. bark from trees. So also Arbofili Dendrophilia is a sexual fetish that
Odors
Sexual arousal from smells and odors emanating from the body, especially the sexual area. Olfactophilia, or osmolagnia, is a fetish,
Scratches
Can be incorporated into rough / rough sex. Can be used as punishment or reward. Can be combined with other types of activities
Breath Play
Being turned on by this is known as hypoxyphilia (typically done alone) or Asphyxophilia when done with a partner.
Strangers
For some, it's the idea of having someone they don't know get turned on there
Urine
Sexual act involving urine. Also known as "Watersports", urophilia or "wet games". Urophilia is a sexual fetish in which persons
Hell
Stygiophilia is a relatively rare form of sexual fetishism in which individuals are turned on by thoughts or fantasies of becoming
Wet and Dirty (WAM)
WAM stands for "Wet and Messy" and is the term usually used. Many WAM fetishists love to get wet and
Pecattiphilia
Pecattiphilia is a form of fetish that has been known for thousands of years. It is a passion for sin
Water
A sexual attraction to water, places with water and activities under water. Fetish for water and having sex in or
Sneaky
Fetish to listen / eavesdrop on someone having sex, without permission. Ignition by experiencing things through sound. ecotourism,
Jeans
Jeans are a popular form of clothing for many people, and thus there is an opportunity to use them as a part
Eating people
Vorephilia, also known as vore, is a type of fetish that involves the fantasy or desire to be engulfed by someone
Eyeballs
There are a number of different reasons why someone might feel arousal from licking eyeballs. Because some can
Latex/rubber
A latex/rubber fetish is a type of sexual arousal that focuses on the texture and appearance of latex or rubber clothing. People with this