What jumps out at me is this:
These men, who willingly harm each other and those harmed wanted to be so and this is not in question, get prosecuted because it's (rightly) against the law to cause such harm regardless of the wishes of the victim.
While men still get away with literal murder using the defence that the dead woman wanted whatever sick shit ended up in her death.
What a fucked up world we live in.
And yes - these men all need serious psychiatric help and probably secure care to protect other people. Not least because at least one of these is a paedophile who actively harmed at least one child.