[Mr Rogers]

Good point. Swimming in a sewer would do you no harm because the filth is on the outside...

[Boogieman]

That’s a flawed comparison. Do you not think that the armor of God can protect one from spiritual dangers better than your skin and immune system can protect you from physical ones?

[Harmless Teddy Bear]

As long as it stays on the outside you are quite correct. It would not be pleasant but that is why you have skin. Not just to keep the good stuff in but also to keep the bad stuff out.

After you need to shower so some does not accidentally get inside you.