"A sense verb is a verb that describes one of the five senses: sight, hearing, smell, touch, and taste.
Verbs such as look, seem, taste, feel, smell, and sound are sensory (sense) verbs. In English, it is
important to use adjectives rather than adverbs with sense verbs."
- you look so perfect
(a line in many songs, e.g. Megadeth: Emperor) the adverb of "perfect" is "perfectly" - but this is about what the person looks like,
not about their eyesight/ way of looking at things
- "I don't look gothic, but I am gothic at heart"
(a comment on a Youtube video) - this example shows even more clearly that the ostensible adverb must be an adjective
describing the person in question (or, to be even more precise, the person's looks)
Looks good, smells good, tastes good -
and yet it's not good for you!