This is superficial.

I am extemporizing now." "Well, if this is extemporizing," said Peter, "God help my soul if you ever go at me with a pin and a microscope." "Oh, but I won't!" cried Linda.

"It wouldn't be kind to pin your friends on a setting board and use a microscope on them.

You might see things that were strictly private.

You might see things they wouldn't want you to see.