They can't stand to see happiness and companionship based on love.
Take it from me, a sensitive guy named appropriately, uh...Sauron. I never got any love serving Morgoth.
Mine’s a tale that can’t be told, my freedom I hold dear.
How years ago in days of old, when magic filled the air.
T’was in the darkest depths of Mordor, I met a girl so fair.
But Gollum, and the evil one crept up and slipped away with her, her, her....yeah.