Fixating On Your Fixation (слэш)

Stiles’ pupils are blown when Peter grabs him by the ring of the gag and tugs his head down. While he’s sitting on the couch and Stiles is kneeling, in their usual positions, Peter snaps the ring gag onto the attachment around the base of his cock.
The lock clicks into place and suddenly Stiles’ lips are sealed around the base and kept there by the harness around Peter’s waist and legs.