How to toggle gravity on a rigidbody object?

My current code requires a key to be held down to hold an object which turns off gravity and follows the controller (This is VR) When I let go gravity is reapplied and it stops following the controller.

  private void OnTriggerStay(Collider collider)
     {
     item = collider.gameObject;
 
         if (controller.GetPressUp(gripButton))
         {
             item.GetComponent<Rigidbody>().useGravity = true;
             gameObject.GetComponent<Renderer>().enabled = true;
         }
 
         if (controller.GetPressDown(gripButton) && item)
         {
             
             item.transform.parent = this.transform;
             item.GetComponent<Rigidbody>().useGravity = false;
             gameObject.GetComponent<Renderer>().enabled = false;
         }
     }
 
     private void OnTriggerExit(Collider collider)
     {
         item.transform.parent = null;
     }

However I need it so that on first click it will pickup the object and on second click let go. I am also not just looking for the code to be given to me some commenting would be nice.

Thanks for the help!