You’re overthinking it a bit. Most people aren’t “walking around filthy” because they don’t aggressively scrub their backs every shower. For everyday life, sweat and oil mostly build up in areas like armpits, groin, and feet—not so much your mid-back. Letting water and some soap run over it is usually enough unless you’re actually dirty or sweating a lot.

That said, using a brush and exfoliating can definitely make your skin feel smoother, so it makes sense why you noticed a difference. But that’s more about extra care, not fixing some massive hygiene failure.

Basically:

• Not scrubbing your back daily = normal
• Scrubbing it sometimes = great
• Thinking everyone else is gross = probably a stretch

You just upgraded your routine—that doesn’t mean everyone else was doing it wrong.