"I'd imagine so." He starts to measure the dimensions of Taako's cock. "Interesting. Slimmer than humans, but just as long."

With that done, he takes a swab of the pink tissue of the cock proper, and a second swab down the sheath. These go in two of the test tubes. The last and largest is pressed to the head of Taako's length as Byakuran begins to jerk him off more earnestly.