I was 12 when I got my first 키스 from a boy. Girl wise I was 16. Honestly I don't think there's a real "good age" for a first kiss. It depends on the person and if they are in 사랑 또는 not
i was 7 and i didnt know what 키싱 was. but i was at my friend Matthews house and he was saying how he has kissed a bunch of girls and i got really mad because i havnt kissed anyone. so i asked him what it was and he told me, and i just kissed him.