In the current environment, BD5M is divided into a large circle and a small circle by some fans. The large circle covers a wide range of areas, while the small circle only covers a certain aspect.

TK

refers to scratching The behavior of itching (the soles of the feet). Relatively niche, many stores also sell TK supplies (ratchets, feathers, etc.).

SP (Spank)

Refers to the action of slapping, which can be any part. This is relatively popular, but also relatively niche. The reason why it is popular is that basically all plays in the circle will include this link. The reason for the niche is that some fans only engage in SP.

There are also many friends who are confused about K9. In some eye-catching articles or marketing slogans, k refers to (a certain slave). Let’s start with the most basic K9.

K9 (Canine-dog)

Wear a collar, a leash, a ball on the dog, hold the rope to guide the dog to crawl, and to make it bigger, put a dog basin. Pour in food and watch the dog lie down to eat, lick, trample, keep in a dog cage, etc. It is not really about turning the partner into a dog, but it is about inflating the shame of the passive person during the activity and relaxing the stiffness of the body, which is considered as foreplay for the subsequent activities. Also to keep the passive person in awe of the dominant person.

As far as I know, there is no such thing as K0-K8. These words are just made up to match K9. Simple explanation.

KO

Does it look like it? The person with the big mouth? Represents the toilet

K1

1 Doesn’t it look like a person standing to serve? This is a waiter

K2

Does 2 look like a kneeling person? This is kneeling

K3

3 Does it look like a certain part? It represents SP, which is also punishment

K4

4 Does it look like a tied person? This is a rope

K5

5 Does it look like a fat man with a big belly? This is a pig

So 6 stands for sexsixsex,

K

7 is homophonic for wife, and the same word for a man is husband

K8

The closest to K9, K9 is a dog and K8 is a cat

(ps: The above content is to put aside the view that k0-k8 is not recognized as a popular science! This article does not discuss k0- Whether k8 is a non-circle term)