I shower with my baby during his swim lessons because it's the only option to wash off the pool chemicals after. I make sure to have a firm hold at all times and only wash one area at a time. It's much safer that way and he gets clean.
I helped bathe my girlfriend's baby niece once. Her name was Alyssa and she was the cutest 2-year-old (at the time) ever. She was all splishy-splashy in two inches of warm water. Bathing done safely, CORRECTLY! :)
How would you know this?