Thiking about how the Teif Beef move their tails - Teiflings aren't cats or dogs or snakes or monkeys or anything else... they're people and the ways they move their tails reflect that. Some folks pick up habits from family members (or even the family pet) to express themselves, but it's like trying to quantify hand gestures - it's going to vary region to region, person to person.
Karlach:
Her tail moves a lot, just like her, she thumps it around, waves it when exited, and plays with it when she's bored. Her motions tend to be big and unafraid of taking up space.
a) Dozing off - it's still on the ground.
b) Stimming - she swishes it against a nearby surface, the ground in this case (Tav does the same thing)
c) Holding it still while it's twitching - holding the end of it means the middle of it can still move freely.
d) Lazy stretch - Just a normal little flick because it doesn't hold still long
e) Killing a bug - keeps her sharp
f) Self hug - keeps it out of the way (although this is something she'll usually just do by herself)
Tav:
Tends to be a little more still than Karlach, or at least smaller in her gestures (she's a monk), but she's still expressive with it, and sometimes it has a mind of it's own. She holds it and plays with it a lot too (which her family found rude - but her mentor at the monastery figured out helped her concentrate).
a) Dozing off - also still on the ground, usually the only time it will be flat on the ground unless she's ill
b) Meditation - it's still but she'll have it wrapped around herself or be holding it off the ground
“Are you mad that I cuddled up with Halsin?” She brushed a lock of silver out of his face. He did not answer but somehow managed to pout harder, avoiding her eye contact. “I really meant nothing by it. Sometimes I hate touch, other times I crave it and in that moment it was helpful.”
“I understand that he brought you comfort. I wish I was the one who could have supplied it is all.” He still wouldn’t look her in the eyes.
“Do you want to keep us exclusive?” Paradigm brushed his cheek while she asked.
“I’m guessing that isn’t exactly what you need.” Astarion finally met her gaze, a look of defeat in his eyes. Paradigm leaned down and kissed his forehead.
“How much have you pondered love?” She asked in return and before he spoke she added, “to be more specific, have you personally broken down the idea of love and considered what you need?” Paradigm gently massaged his ears, and he looked at his hands as he contemplated.
I'm over halfway done. My voice has nearly gone out a few times this last month so I haven't gotten as far as I've wanted. But this sentence made me smile as I read it 😅🤣