Kung gabing ang buwan Sa langit ay nakadungaw; Tila ginigising ng habagat Sa kanyang pagtulog sa tubig; Ang isang larawang puti at busilak Nalugay ang buhok na animo'y agos; Ito ang Mutya ng Pasig Ito ang Mutya ng Pasig Sa kanyang pagsiklot Sa maputing bula Kasabay ang awit Kasabay ang tula: Dati akong paraluman Sa kaharian ng pag-ibig Ang pag-ibig ng mamatay Naglaho rin ang kaharian Ang lakas ko ay nalipat Sa puso’t dibdib ng lahat; Kung nais ninyong ako'y mabuhay Pag-ibig ko'y inyong ibigay
Sir, ang Mutya ng Pasig song is not about the town of Pasig. Abelardo's composition is about the beauty of Pasig River along Manila, wherein may mga kuwento noong unang panahon na may nagbabantay sa ilog na isang napakagandang sirena na kung sino man ang magdumi o magsala ula sa ilog ay mapaghihigantihan. Of course, that is only a folklore.
This song is for women only. "Mutya" is a term of endearment for a female. Also note that the song says: "Dati akong paraluman," and paraluman is obviously a female.
Did Nicanor himself say it should only be sang by women only? So if I'm a guy, and I came to like a song with very feminine lyrics, then must I prohibit myself from singing it?
The whole song could be just in a perspective of a man telling the story of "Mutya ng Pasig". Anyway, there's nothing you can do since the artist reserves the right perform it any way they want. Also, remember that the men were the first to "rob others of their music". Men were willing to cut off their gonads just to get the soprano lines.