ball restraint ring:

Adjustable metal or leather ring that fits over the testicles and can be tightened to induce pain to the testicles of a masochist.
See also: ball-collar .
See Also: anal collar, anal sphincter, annular hymen, ball bag, ball basket, ball collar, ball restraint ring, ball sack, ball-tearer, bawls, Ben Wa Balls, buff ball and ballum rancum, CBB, CBT, CBTT, licentiousness, nut-cruncher, ringpiece, Rino Tama, Thai beads, turn someone on, vaginal balls, Wentworth Falls

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