For men, it just makes sense to pee in sinks, theres not much difference between a sink and a urinal, not to mention its mich better for water conservation. I live on well water so the fight to conserve water is constant, the men in my life use the sink whenever they need to relieve themselves.
Alot of people think its gross... But they are just living by MSM reality which means nothing really....
I have heard some men do this, but I don't have the nerve. It would take care of my extreme self-consciousness about the loud splashing sound when peeing into a toilet, though.