No, it is not ethical at all. Humiliating someone based on any physical characteristic is a form of body - shaming. Everyone should be respected regardless of their body type, and spreading such stories can cause great harm to a person's self - esteem and mental health.
First, you need to make sure your skin is clean. Take a warm shower to soften the hair and open the pores. Then, use a good quality shaving cream or gel. It will help the razor glide smoothly and reduce irritation. You should also have a sharp razor. Dull razors can cause nicks and cuts. And don't forget to exfoliate gently a few days before the shave to get rid of dead skin cells.
I'm not aware of any widely - known 'hypno shave' stories that are particularly famous. It's a rather niche concept, so it's not something that pops up in mainstream stories very often.
If you come across such stories, don't share them and encourage others not to as well. Also, promote positive body image campaigns to counter such negative ideas.