My master got me a butt-plug and he wants me to be his pet for him but it hurt to much and I got the strict stare thats sooo Intimidating, what do I do?

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Start small and work your way up, my girl and myself made the mistake of doing anal without acclimating first and she couldn’t handle me for Ling without it being unbareable. Get a tiny plug first, also there is lube with muscle relaxers that help.