The rationale he uses is hilarious; "I don't want to put my mouth where you go to the bathroom." He even talks like a 12-year old.
If you eat food with your hands, you're coming into contact with more germs than sucking on a dick. Touching door knobs, phones, stairway railings, chairs, tables, you name it.....all more germ-infested than your schlong. Urine is sterile, anyway. If you bathe yourself, it's just skin. If you're afraid to put skin in your mouth, you're in need of some therapy.