Is Pornography just nudity in motion,?

Answer 1

Lol, I'd have to say no. Perhaps if it was just naked people bouncing around, you could call it that, but since it generally involves a sexual state of change (i.e. a man becoming erect), it becomes pornography.

Answer 2

An interesting way to put that.

It is more than just nudity in motion because it involves more that just people without clothes. Sexual acts are heavily depicted in porn.