My girlfriend and I were making out downstairs in her living room one night and I grabbed her dog’s collar and put it on her, I then shoved her to the floor crawling on top of her gently kissing her and teasing her. When I was ready to show her who her Master was I picked her up by the collar and dragged her upstairs throwing her onto her bed taking her clothes off and teasing her with my tongue and fingers before I got naked and started to assert my dominance listening to her moans and howls.
Source: reddit.com/r/gonewildstories/comments/44uhxy/time_i_made_my_gf_wear_a_collar
Once collared always owned
So she became your bitch, essentially.