Can't resist sharing more info on this subject. There was a story on DIRECTV late at night, I think it was on FX, about a penis museum in Scotland. Their largest example was from a sperm whale, 8' long and over 200 pounds! And they interviewed an old man who had agreed to provide their first human specimen, (after he died, of course).

I remember getting in trouble at about 10 years old for pointing out, to a 6 year old neighbor boy, the action in a fish tank of guppies.