>"The erection in the male occurs with extreme rapidity. We have observed and timed it in our own tanks: it is something m the order of three seconds to completion, from the time the penis first appears in the slit. It can collapse almost as rapidly, and it looks almost as if it were being done in a voluntary fashion. It is very easy to condition a dolphin to have an erection. The stimulus, for example, can be a single visual signal. One trainer chose to raise his arm vertically as a signal, and the dolphin would turn over and erect his penis in response. If Elvar, one of our dolphins, is alone and a small ring, about a foot in diameter and an inch thick, is tossed into the water, he will have an erection, with his penis lift it off the bottom and tow it around the tank."
