(Non-antibacterial) soap just sticks to bacteria, making them more slippery, so they can be washed away. They're still alive in the drain and septic/sewer. But

(Non-antibacterial) soap just sticks to bacteria, making them more slippery, so they can be washed away. They're still alive in the drain and septic/sewer. But soap doesn't just magically do this - it has to be foaming, as scrubbing allows the soap molecules to magnetically organize. As the hydrophobic soap molecules stick to the non-polar bacteria, they form a bubble shell that's not unlike a cell wall. To produce this foam with normal hand soap takes ~20 seconds of rotational scrubbing - a soap-Rasengan, if you will. Bacteria are in everything, including every breath of air and gulp of water. Our immune system kills the ones which get through our small intestine's mesh system.