Why Manny should "take the test"

For starters, I am a Pacquiao supporter, and also one who is somewhat critical of Floyd Mayweather, his antics, and the antics of his family. I don't really consider Manny to be a dirty fighter, at least not more so than any other fighter. But, the supposed "controversy" has reached ridiculous proportions. Any purported negotiations seem to break down into "Floyd is ducking" "Manny, take the damn test." So, while I don't agree with the rhetoric coming from Floyd's side, it does seem to me as if Manny could silence his detractors by indeed undergoing USADA testing for one of his fights not connected to Mayweather. He could just say that he didn't know what the testing was all about before, but after becoming educated about it, he realized that it is a positive step toward cleaning up the sport of boxing to undergo such testing. Make no mistake, I don't think Pacquiao is in any way obliged to do so, but doing so could in effect silence a lot of people in the boxing world, including the Mayweathers.