At a friend's party, I was bored so I jumped on his piano and played a few slow songs (First Love, Utada Hiraku and Eyes on Me, FFIII) that I liked. Like in one minute girls crowded around me and I got requests to play this and that. Got a few numbers too. I guess when you play and sway your body like you are all into it it really works. Finally something I dreaded learning as a kid has come into use.