Beating one out has gotten a lot of bad press lately.
It’s important to remember The Church has been anti-masturbation for centuries. Prohibition extends from a desire to control sexual habits that works in social engineering. Whatever the motivation, controlling what we do in private when we hurt no one should be questioned.
Just as you can be influenced to stop masturbating, you can be influenced to masturbate to one image over another.
Protect your right to masturbate. Be fussy about what stimulates you.
But most of all, question anyone, every time, if they try to tell you it’s wrong.
That includes if they try to make you feel guilty.