(C+D)² + (M+D) = B
B = BEST BDSM practice ever!
Clings Film (C) + Duct Tape (D) = Mummification (M)
Mummification (M)+ Duct Tape (D) = Breath Control (B)
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Source: Tumblr http://thetomblur.tumblr.com/post/82253348897