If anyone ever came over to chain me up, this type of gag would be the final touch. All I ask is for you to gently apply it and to reassure me that it's for my own safety and protection as you cuddle and kiss me.
Then check on my gag and gently ask me if it's too tight as I happily nod my head no. Then kiss me on my gagged mouth as we watch anime together.
This fantasy is so specific.