My s/o has a mouth guard. She wears it every night. She actually likes it. She now sleeps at night and she wakes up in the morning and does not have a sore jaw.

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"In my sex fantasy, nobody ever loves me for my mind."
Nora Ephron

“Clinton lied. A man might forget where he parks or where he lives, but he never forgets oral sex, no matter how bad it is.”
Barbara Bush

"You know that look women get when they want sex? Me neither!"
Drew Carey