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“Smurfing” is the erotic practice of tying spare dental floss around the base of an erect penis, and waiting for it to subsequently become a bluish black hue, similar to that of a Smurf (a fictional blue troll-like character) this process is completed with an intense masturbation session while laying down, completing this smurf-like look by covering the tip in semen, resembling the hat of a Smurf.
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