How's about public porcelain throne etiquette?
Yes, the call can wait until you are finished and have washed your hands with soap.
Last time at Microcenter, I got to hear all about some dude and his old lady, as he spoke to her on his cell phone whilst grunting out a loaf. On speakerphone. I held up my end to aid in the acoustics during the call. I wish I had eaten half a box of raisin bran with some lima bean chasers that morning.