Commands are:
"HappyTail" puts the tail up in a curl, like a Squirrel. It loops and will play until you switch Nodes.
"CattyTail" whips the tail around like a cat, ready to pounce. It loops and will play until you switch Nodes.
"SexyTail" brings the tail up the avie's body in a slow and sultry way.
Switch Sit or Stand Nodes to reset the tail to it's "Wrapped" default animation.

PLEASE NOTE: This item will work equally well with Male and Female avies, but is found under Female Accessories because IMVU lacks a Uni- category.