Scientists have found a 28,000 year old carved stone phallus in a German cave. It's highly polished, clearly recognizable, and of the proper size to have been used as a sex aid. Apparently it had a secondary use as well, for it's scratches show that it was also used to chip flint tools, like knives, axes and spear points.
I'm not going to make any of the obvious jokes, but I'm delighted to see that even 28,000 years ago our cave-dwelling ancestors had a sense of humor we can recognize and relate to. I guess not that much has changed after all.