Why do you like things more just because you've seen them before?
You like things more just because you've seen them before - even when you don't remember seeing them.
Mere repeated exposure to a stimulus - a face, a word, a piece of music - tends to increase how much people like it, even when they don't remember seeing it before. Familiarity breeds preference, not contempt.
A song you disliked grows on you after it plays everywhere for a few weeks.
The more you encounter something, the more you tend to like it - often without realizing why.
Repetition alone builds preference - it's why ads repeat, and why to question liking driven by exposure.
Familiar feels friendly.
Learn the idea and practice English at the same time.