TW: Animal abuse mentioned I guess
Back when I was studying psychology, we were also being taught about various perceptual disorders, how they develop/are caused, what they cause in your brain, how they affect vision, sense of balance etc.
And our psychology professor explained, just as an aside, that some of these disorders were studied on young animals, which were deliberately deprived of particular sensory impressions ffrom birth (the example he used, I think, was of a kitten literally raised in a tube painted with vertical stripes).
During the lesson, I told my 'friend' that I don't feel comfortable with this kind of animal abuse. That's all. That's all I said. I don't like it.
And she made a disgusted face at me and told me that without these kind of experiments, we'd have a lot less knowledge about perception, cognition, brains etc. (true) and thus, they are necessary (maybe?) and I should be grateful they are conducted at all (respectfully, no).
We didn't stay friends much longer...