At least armpits are small. It's pretty much a given you'll get a clean sweep even if you can't verify it visually. Legs are a different story. I'd fall on my ass if I had to get up that close in the shower to make sure I didn't miss a patch.
They should make bi-focal anti-fog prescription shower goggles. That way, your legs would always turn out to be silky smooth and your landing strip wouldn't end up looking like more like a cornfield.
Just random thoughts at 10:30pm at night after rising this morning at 4:30am. Brain clutter. Night all.