Just learning.  Can anyone explain the difference between these three ?

The Worldwide web has the ability to search anything. Just type in your question. Here is a link to your question below. Sub & Slave are the most common, but a piggy can be a person who pays, like for use as financial domination. Pay pig, or piggy 🐷 it’s also used as a gay term for men who love anal sex…piggy. Lol!
If you’re interested in a private lesson I am always available to book in person, or online as well. I am a lifestyle Domina with over 2 decades of fun experience. I am always looking for new subs, slaves, and piggy’s.

The Dictionary is especially interesting.   Domina, Dominatrix, Domme, ProDomme.  Who knew the differences.  Thanks for taking the time.  

Thank you Queen Bia.  There is more to it than I thought.  Maybe an online 'lesson' would be on order.  😀

Ironically the first thing I noticed about the "BDSM community" was a high degree of conformity.  You'd expect it to be the wild west, but instead there's an atmosphere of "authorities" barking out rules and regulations.  Defining things, etc.  All you have to do is spend ten minutes on fetlife reading all the rants telling you what is and isn't as they define what reality is to be accepted.
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F that.  My advice is if you meet someone who throws a crowd sourced "rule book" at you, move on.  Find someone who is more individualistic and follows their own course.

END OF MESSAGE

Are always available…

Outside of "paypig kink", "piggy play" describes a specific kind of raunch

"Pig play" is an umbrella term often used by folks in gay community. Piggies that I see enjoy scent play, sweat, piss, spit, cum, sweat etc. It can also include scat. Some like to dress up as pigs too, so can have some crossover with pet/animal play.

All folks have different degrees of fetish and kink. You can't have a wild wild west when someone likes extreme play and someone wants very light bdsm fetish. Of course you're gonna have rules and such.  

 
A lot of women into sub fetishes have it as a kind of a very delicate fantasy and you have to respect that. A lot of guys think that for some reason women into humiliation/domination are into that with everyone in the community. Thats extremely wrong. Respecting limits and rules safewords etc goes a long way.  

 
I've been a member of fetlife for a bit and its been a very good community for me. Met a lot of kinky people, attended gangbanhs, orgy parties, etc.

I said in my last sentence to go with the individual's desires, not some community rule book.