An apparatus for massaging a prostate gland and for providing treatment for hemorrhoids through the contraction of a human sphincter including a head having a size suitable for fitting into a human rectum and through the sphincter and a resistor connected to a bottom of the head. For example, dicarboxylic acid decomplexer, carboxylic acid ester decomplexers, and monocarboxylic acid decomplexers are useful in the present invention. A distance measure on the AMACs, such as a Hamming distance measure, may be used to determine whether the number of bit differences between the messages is likely to be within an acceptable amount. Preferably, pressure waves are used to speed up the depressurization.