LOL! Great article Elle. I knew that elephants had prehensile penises but did not know that dolphins do. Upon reflection I can see the obvious evolutionary advantage. I believe dogs also have barbs or some such feature that prevents immediate disengagement after copulation as well. However, as far as I know, the 'barbs' themselves, for all species that have them, are soft tissue and do not cause pain to the female regardless of the vocalizations one might hear.