If you think art is good and masturbation is bad, you will most likely deny that there is truth in this tagger's analogy.
If you think art is bad and masturbation is bad, you will most likely agree that there is truth in the analogy.
If you think art is bad but masturbation is good, you will most likely deny that there is truth in the analogy.
If you think art is good and masturbation is good, you may or may not agree that there is truth in the analogy, depending on whether or not you have experienced or witnessed artful masturbation. But you would be duly challenged to argue that the creation (and, often, the consumption) of art is NOT masturbatory.
If you think both art and masturbation are good and concur with the tagger's correlative, you might wonder why someone felt the need to state something so obvious.