The old saying would have you believe that "size doesn't matter", but it matters a whole lot when women are too afraid of your manhood to have a relationship with you.  Roberto Esquivel Cabrera has the world's longest penis, measuring in at a frankly incredible 18.9 inches. In some circles, at least according to what movies have taught us about locker rooms, having a large appendage only bestows bragging rights and God-like status. No so, according to Roberto... and it can actually make life very lonely indeed. The 52-year-old from Mexico claims that women are too scared to have sex with him. Not only that, he wants it to recognised as a disability as his large penis has made it difficult for him to hold down a proper job. You might understand where he's coming from when you see that it actually hangs below his knee. According to scans carried out by doctors, the "main part" of Roberto's manhood is six inches long, with the remainder comprised of extra skin. Cabrera said: "Look where it is, it goes far below the knees. I cannot do anything, I cannot work, and I am a disabled so I want authorities to declare me as a disabled person and give me support. Then, I want to go to the Guinness to get recognition."