Just for clarity, it is not against the law to masturbate to child images in

1) legal pictures
2) legal movies
3) memories/thoughts in your head
4) depicted in paintings
5) depicted with sculptures
6) legal text stories

These are absolute, morally defensible outlets.

It should be noted that, yes...you need to know the laws in the jurisdiction you live in.

I'm speaking from the perspective, of someone who lives in the Prison States of America.

UK law is completely off it's hinges...as it is, in many other places around the globe.