BBW (Big Beautiful Women):
Derogatively called fatties, chubbies, or plumpers, a preference for BBW or XxxLarge women tends to be a fetish popular in the South for some reason. In its passive form, it mostly involves the love of amateur photos and movies. In its active form, it can involve wife swapping, orgies, and sex toy insertions.
The appeal, of course, is the size, and the attitude that you're with a real woman (big breasts and thunderous thighs). Enthusiasts claim the orgasms of BBW are greater. A milder variation of it is called big tits fetish. Nipple fetishes also exist, as well as the opposite of big, little people, or what goes by the name of midget sex.
Bestiality:
The love or lust of animals, occurring primarily in rural areas. On the love side, "zoophilia" means having a genuine feeling for an animal where sexual desires are not consciously present, but nevertheless there. On the lust side, "zooerasty" means to have intercourse or masturbation with an animal. There are a number of types of sexual orientations and behaviors, from fellatio, cunnilingus, anal and vaginal intercourse, masturbation, fisting, to head thrusting.
Little data exists on the most commonly involved animals nor the reasons for this fetish.
Chastity Belts/Locking Corsets:
Also called knickers, bloomers, and including the world of specialized G-string lingerie, the wearing of such clothing has been associated with BDSM play from the beginning. It's a myth that chastity belts were used during the crusades. They're uncomfortable to wear for any length of time.
There's a necrophiliac connection as in the 19th century, corpses were put in their coffins with them. In the 20th century, doctors prescribed them for young males to keep from masturbating. Today, the practice is popular in parts of the gay community, Femdom/malesub relations, and with flogging.
The full outfit is made of metal and includes a bra connected by chains. Sometimes the outfit contains the possibility of adding one or two plugs (for women) and a tube (for men). A piercing variant involves rings that lock together. Sex is usually accomplished by masturbation or orally by tempting someone to use the key to unlock the outfit. A few outfits allow vaginal and/or anal sex, but the main characteristic is a lock-me-up (continually) fantasy. A few enthusiasts try to wear their outfits under their clothes to work, church, or school.
Dirt Fethishes:
Technically called mysophilia and considered a cousin to coprophilia (the fetishization of shit). Exists in a variety of forms, but most commonly perhaps among gay (closeted) men who find soil stains, dirt, and filth erotic ("jock-sniffing"). Hetero inclinations are also common with panty fetishes (used underwear) and enjoyment of mud wrestling.
Other varieties involve eating animal poop, cleaning the floor with one's tongue, eating cigarette butts, or drinking dirty water from a flower vase (among others). Sometimes combined with the viewing of pornography or an exhibitionist to make the experience more erotic.