With modern medicine at hand, we can change our bodies more safely than we have ever done before.
It is both miraculous and grotesque. It is legal - most of it.
It is a fact that we own our own bodies - if we want to use body modification - WE do it. The crime in body modification is when it is done TO us.
Ritual piercings and body modification can be used for spiritual journeying - as a child I watched Hindus attaching limes to their chests and backs before fire walking. Out of the body experiences are pretty common too - and various situations can trigger them.
Here is Fakir Mustapha being interviewed in two fascinating movies - part one.