I stupidly purchased this product by John Lawrence and it simply doesn’t work. He would say I’m one of the unfortunate 7% that it doesn’t work on. I say he’s a charlatan and a buffoon. I would never get this again and will warn others. Maca root has been used since Roman times yes, but there are more products available with far more of Maca root in it. Please Mr. Lawrence keep your free sex position manuals. I already know what I best enjoy.