This blog sometimes gets into some rather "adult" topics. This item and the good writing of Rachel Feltman for "Popular Science" might nudge some readers toward a more relaxed and broad definition of "natural", whether or not, nature is typical:
With some thought, you can see that either sex of the primates can create stimulation with many surfaces, substances, and squimings. Stay alert for reports of bear oral sex. You may want a subscription to Popular Science.
I read somewhere that a person was quoted as saying that people changing sexes shows that the devil's plan for humanity is working. I wonder what sort of conclusion this inter-species activity will elicit from that person.
