I really like how it can fulfill all those abstract needs. First, you can have glasses-wearing girls take them off and suddenly become beautiful, or have girls wearing glasses flashing those cute grins, or have girls stealing the protagonist's glasses and putting them on like, 'Haha, got your glasses!' That's just way too cute! Also, boys with glasses! I really like when their glasses have that suspicious looking gleam, and it's amazing how it can look really cool or just be a joke.