Nah, this is a Chicken vs Egg argument again. If you're sick in the head, you look for porn to hypnotize you to become a femboy. If you're healthy, and you stumble upon porn to hypnotize you into becoming a femboy, you could watch it for hours without impact... Except, I assume, to lose any desire you had to watch porn.

The porn industry haven't cracked the secret of hypnosis and mind control. It's never worked, it's just one of those things people like to imagine working. A spinning spiral and suddenly a woman is your servant. A swinging watch and suddenly she doesn't know she's naked... Or, in this case, a flashing light and... Suddenly you want to wear panties?

Sick people seek out sick things and do sick things. This is no different than blaming video games for violence. Violent people do stupid shit. It wasn't Grand Theft Auto that did it, they were always in need of a bullet.