Some of the non-obvious stuff.
Poseball I call it, essentially with pronouns the Poseball is tossed back and fourth, the moment a specific object/player is mentioned that pronoun Ball pings to them and will refer to them from then on.
Consider the following pose,
.pull at my socks and .look to JoeBaka and JaneBaka, and I .smile at him, and .turn to her and .grin, my eyebrows pulsing on my forehead with implications.
This would probably display to JaneBaka, as,
JennyBaka pulls at her socks and looks to You and JaneBaka, and she smiles at him, and turns to her and grins, her eyebrows pulsing on her forehead with implications.
But it would display to JaneBaka as,
JennyBaka pulls at her socks and looks to JoeBaka and you, and she smiles at you, and turns to you and grins, her eyebrows pulsing on her forehead with implications.
Not the worst fuckup, but still a fuckup. Because you forgot where the pronoun poseball was.
Something that also is a big disconnect at first, if you're used to writing in a MUD in third person.
Poses are first person perspective from your characters point of view.
Me My I
She Hers Her
So, other important thing to remember, is that people are accepting of fuckups and generally want to help, if you're one on one with someone and they fuck up, and you know how they fucked up. Something you can do is, ask for clarification, and then give them the pose as it appeared to you.
Don't tell them to repose, don't say they did really anything bad, just make sure they know that they messed up the pose, and if they ask for help, give it to them.
Some good places for getting help with posing on your own.