Alright, so I think I know why Murdoc painted his pinkies red a while back.
Australia started a movement to raise awareness on children who get sexually assulted. In this case, people could donate to a fund which helps children get over their trauma and prevents trauma itself.
One in five children are going to get sexually assulted, and still are. As you know, Murdoc was one of those children, and so are a few of us here on this Wiki. Since we all have five fingers on each hand, the person can paint one finger on each hand to spread awareness.
Men and women can partake in this, but mostly men do it, since ninety percent of the sexual assult cases have been caused by males.
This must've been a sensitive topic for Murdoc, and being the person he is, participates in it. We're not sure if he donated anything to the cause, but we do know he's promoting it.
As of today, the cause is still going. It can also be seen as the one in five children that die as a result of violence.
Now to all of you who think Murdoc is the most terrible person alive: You're so wrong.
Hyperlink to some information: SBS Feed