I've been going to GYM for 5 months and I still do. Someone recommended me to have a body massage every once a week becouse it gives relaxation to your muscle and therefore it expands , gives you a good shape!
It doesn't feel so good to make it, I've tried! And I think some general idea of how the body works is necessary, the spine is a more complicated thing than a server.
With massages people think you just start rubbing and that is all, but there is so much to learn about massages it is crazy. You have to learn all the spots on the body, and how things work. You can hurt someone really bad if you do it wrong.
Also yes I would say the human body is way more complex then a server any day!