NEVER GIVE ADVICE UNASKED
It probably means you give an advice to someone who didn't ask, your advice is not well received and you lost your time, because the other person is not interested.
(consejo no pedido, consejo mal oído)
LOVE LAUGHS AT LOOKSMITHS
It could mean that when someone is in love, does not think much about the problems may have.
(amor no respeta ley, ni obedece a rey)