Dolphin males have a prehensile penis. They can wrap it around objects, and carry them as such.

THis reminds me of an old joke; Tarzan is swinging from some vines when suddenly it happens, he hits into a tree. One of his arms is wasted, one of his eyes is gone and his dick is also pulped. So he goes to a medicine man to get stuff fixed. The medicine man gives him the eye of an eagle, the arm of a gorilla and the trunk of an elephant for a dick. Three weeks later he meets the medicine man who asks him how it's going. He answers, "Well, the eye is pretty great, I can see for miles an miles. The arm is also great, I can swing from the vines single handed. But the trunk, whenever I swing low by the ground, it picks some grass and tries to shove it up my butt."