Aragorn has (gasp!) a . . . tail!

[1sallycat]

I think the tail is real and not added for a Darwinian aspect, because you can see it when he runs naked into the water in "The Road", as well.

 

[RangerWickett]

Mortensen doesn't have a tail in Eastern Promises, which also has a naked fight scene.

 

[Ralif Redhammer]

Hrm. Never noticed that. I’m a big fan of classic Cronenberg, but pretty much anything after eXistenz has left me cold, except for Eastern promises.