Another day, another R. Kelly duet. This time it’s with Justin Bieber, and it’s a track from his “Music Monday” series called “PYD.” It stands for “Put You Down,” which is not meant as an insult. “From the stove to the countertop, dining-room table, are you ready?” Bieb asks where you would like to be “put down.” For sex. Not like a sickly cat at an animal shelter. Got it.