A couple of videos I found where a couple of women are doing ball-gag karaoke where they wear ball-gags in their mouths and people have to guess what song they are singing.
http://www.youtube.com/watch?v=LBetGbsxE_w
http://www.youtube.com/watch?v=kWQTfOvwPAM
You know this could be the next theme month idea for 2015.
Ball-gag Karaoke
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