i cannot define or explain why this trainer works like it does. but it does! are there other possible variations of this type of exerciser that would work, i do not know but i do not see why not. but i do know that nno one has ever gotten one much less two utility patents on putting a towel on your penis. i do know that the spring in the way it is designed in combination with the weights does something for the penis that has impressive results. again i said i was average it just now i look like a shower but i am still a grower! i am more confident. i communicate better. and for those of you who understand... using the kegelmale trainer has caused qi swirls in men both with orgasm and with out.