I think everyone looks like an ape when I smoke.
Why do those people look like apes to you? Are you using drugs?
Well I was born blind so I just imagine they look the same.
It's understandable that you might not know what a human actually looks like, but it's still a little rude to think of them as apes. It's a hurtful insult to many.
I can't tell that I'm being rude. I don't notice others' reactions.
Even if you're blind, don't you think it's worth it to try and learn how to gauge people's reactions in your own way? You can listen to their tone of voice for the most part!