«وَرُبَّ مَذَّاقِ الْهَوَى خَالَنِي / أَصْدُقُهُ الْوُدَّ عَلَى لَبْسِهِ»
Many a person who merely tastes affection has imagined that I offer him sincere love despite his pretence.
Madhdhāq al-hawā depicts a superficial participant in affection—someone who samples its pleasures without sincerity. Love is made tangible through the action of tasting.
Labs here means confusion, disguise or falsification. The poet claims that he can distinguish honest attachment from a performance, even if the other person assumes he cannot.