This is a fun direction to take Sou's denseness. He's too dumb to realize that he needs to discard his previous conceptions of how the sexes interact to comprehend how this world works, so he just assumes the problem is he's being viewed as a pervert, even though that is 100% not what Suzuki was trying to say.
I don't think it's that dumb. It's a legitimate way for him to think. He's lived his whole life with one set of principles and values, and now he's in a completely different world.
And so far, despite everything, he really hasn't actually seen any direct evidence that contradicts his views. So there's also that.