If in doubt most songs fit into the following categories:
A: ālook at that pretty girl/handsome man I wish she/he would have sex with meā
B: āI am happy because that pretty girl/handsome man is now having sex with meā
C: āI am sad because that pretty girl/handsome man wonāt have sex with me/was previously having sex with me but has now stopped doing soā
You can usually tell which category the song is in by singerās general demeanour even if you canāt understand a word.
Guantanamera has a bit of all three categories I think and also the wildcard:
D: āI also love my country, which I am using this particular pretty girl as a poetic metaphor forā