MM, I definitely caught that GK reference, and I even started humming the song in my head! BTW, en vez de "yo te dí", isn't it, "yo te ví"? Anyway, good tune, and it makes me think of when I studied in Sevilla. Also, although andando is primarily used, they also use caminando too. Maybe it is used more in reference to hiking, like caminando por el campo, o algo así.Re: the designations, like you said, what about pata negra y serrano?