If characters are "T-posing" (standing with arms out), it usually means you forgot to run the FNIS or Nemesis animation generator after installing the mod.
Often used to provide a clean menu interface for selecting different "shows" or animations.
The mod typically adds several spells, such as "Animate Player" or "Animate Person," which allow the user to select from a menu of animations for their character or nearby NPCs.
It is highly recommended to use Mod Organizer 2 or Vortex rather than manual installation to prevent game crashes. Modern Alternatives
It supports interactive scenes where the player and an NPC perform animations together.