Roman System.
This is the Roman Model of slavery (so called because it traces back to the Roman era).
BDSM is not what you think it is. It never was.

First and foremost- No matter what anyone involved may say, consent is ALWAYS part of the story. There can be no exceptions. Any exception is rape and probably kidnapping. This is why a contract is critical, but any contract entered into
Doule Ended Cock Gag.
We Are Not The Same.Fullest Possible Restraint.
An Arrangement That Can Be Used.Cock Gags (again).Training Is Hard, Bitch. Get Used To It.Proper Arrangement For A Slave;
A collar with a ring and/or leash, a bracelet on the right wrist, a brand on the left breast, a brand on the right buttock (not seen at this angle), and an anklet on the left ankle. The anklet is ignored or significantly minimized by some Masters.
AFTER they come to live together is inherently null and void- At very least one of them must move out for a few weeks.

Certain generalities arise here; Most often women are submissive and males are dominate. As such, "He" means Masters and "she" means slaves. Master is always capitalized, slave is never capitalized.

The process begins by him and her meeting and deciding this is the lifestyle they are choosing. From there in the traditions I came up in a Slaver is selected- A Slaver is a specialist Master who trains slaves. He will drop her in an area and return later. At this point he subdues here; In the bad old days we used rubber wrapped police training batons (pvc covered by pool noodles covered by a wine bag). I was amongst the first to advocate changing to paintballs.

Once she's had enough, she will drop to the ground. Slaver will cuff her hands behind her back and put a collar on her neck at minimum (some like myself will give them a ball gag). He then will stand over her and say the magic words "She will make a fine slave." (I like to psych myself up beforehand by saying "This should be a good hunt," but to each their own.)

Slaver then takes her away to another location, a lair he's set out. The first thing is The Crucible. This is where she's tied to a post and whipped. When she says the safe word, stop. One half that is the normal limit for floggings. Since the safeword should be a word the Master finds insulting, Slaver should challenge her, "What did you say to me whore/bitch/cunt/etc.?" the purpose it to instill real fear.

Once Slaver has determined slave is truly afraid, back away and begin the branding process. As this is the Slaver and not the Master, she will be branded on her right buttock to show the Master "who enslaved her worthless ass." In reality, it's because generally only the Master should ever see he bare butt, though exceptions may apply.

If necessary, the Slaver will replace her light collar with a big, soldi, heavy metal collar. It should be heavy, uncomfortable, and most of all humiliating. He will also give her a bracelet and anklet. In theory the bralette is to have easy control of her wrist, the anklet easy restrain to a pillar, pole, or etc.

Now the Slaver will tell her, "You are now a slave. The first lesson a slave must learn is how to such cock, get on your knees (insult)." During this he will hold her head down until she starts to gag at least once. When he's done NO MATTER WHAT he will say "That was terrible. Maybe you'll learn." This is important- She must believe that her efforts, no matter what, will never be good enough. This way when he does compliment her it means something.

Observe the meme to the right, "Your Idea Of A Womans Wedding Ring/My Idea Of A Woman's Wedding Ring/Your Idea Of A Mans Wedding Ring/My Idea Of A Man's Wedding Ring." It's not a meme at all. It's a test.

For a slave any positive response is acceptable. For a Master the response must reasonably translate to an understanding that this is for HER PROTECTION; The collar is to stop her when she gets out of control, the brass knuckles are to protect her from outside threats.

From here the Slaver will train the slave in all important matters; Never speak unless spoken to, your opinion is neither desired nor helpful, how to kneel (on one knee, to allow her to rise quickly if necessary), to always kneel in the presence of her Master, how to walk and how to walk around her Master, etc. He will also have sex with her in every way possible- Oral, vaginal, and anal. If applicable, he will also have he perform oral sex on another woman.

After about 2 weeks of this, the Slaver will introduce slave to her permanent Master. At this point Master will put his collar, bracelet, and anklet on slave and brand he right breast with his own mark. This is the Owner's Mark. The Owners Mark should be at least partially visible when slave is wearing a bra or bikini. With that it is done- She is his slave forever now.

The real secret- This is all about making babies. The Master de-stresses by taking it out on his slave, the slave stresses by these minor abuses. Stress in males makes sexual performance drop off, stress in females makes ovulation cycles faster- That's the reason why when one lion defeats another for control of a pride, the first thing he does is kill all the cubs. That's stress on the lionesses, increasing the ovulation rate. We are humans, we don't kill the babies after defeating the husband, but the concept is the same. It is however aligned to the reason why rape more often results in pregnancy as a percentage of sexual interactions. Anything that increases her stress without causing injury aids this effort. Observe the image of woman in the extreme restraints; This is a stress position, and while it can not be sustained very long continuously it does impose extraordinary stress that can eventually effect mental state.
Although it looks scary from the outside, it's really more of a standard couple; Kids, bills, jobs, chores. All the normal shit. But she will always know she is SUBORDINATE to her Master- she is not and can never be his equal. If she attempts to shit test him, he is to punish her. If she disobeys, he is to punish her. If she speaks out of turn, he is to punish her. This is that tiny part of her mind that needs desperately to be pregnant again, and he's here to accomplish that.

Roman Vs. Checkub Systems.
The Checkub System (so called because the first known advocate was a Micheal or Mitchell CHECKUB, a sociology student in the 1960's at San Francisco) centers around the slave collaring herself. This system is repeatedly proven to fail because she knows it's HER collar, and therefore she can remove it at any time. Additionally, Mr CHECKUB was a professed homosexual. Indeed, it appears perhaps he never intended it for heterosexual couple. Most Checkub advocates do not mention contracts, though some do.