Now I understand why athletes have tattoos all over their body. Because tattoo can be a safer medium of taking performance-enhancing drugs at the time of Olympic events. Wow! The players are faster than the masters! And the good thing is it can insert so small doses through the needle that the IOC testing may be unable to detect it. And the big cheaters have explored big ideas- mixing erectile dysfunction drug Viagra along with nitrous oxide, or laughing gas, which increase the flow of oxygen in the blood stream and boost the energy. I think it will take no time, when athletes and tattoos will be inseparable from each other. But I am sure âtattoo-spying machineâ will be the next invention in the row.