Unfortunately, all I could find was Wikipedia:See also, which is unsatisfactory. I do believe that Ben Wa balls are unrelated to Benoit - but of course you will say that it is related by how it sounds. I respect your position, but I disagree with it. And I have a feeling that various Wikipedians would have various opinions on this question. I would suggest perhaps we open a co-operative RFC to resolve this. What do you think?