I've looked on a lot of women with lust. I've committed adultery in my heart many times. This is something God recognizes I will do - and I have done it - and God forgives me for it.
I read one psychologist's theory that said, "Never strike a child in your anger." When could I strike him? When he is kissing me on my birthday? When he's recuperating from measles? Do I slap the Bible out of his hand on Sunday?
With three or more people there is something bold in the air: direct things get said which would frighten two people alone and conscious of each inch of their nearness to one another. To be three is to be in public - you feel safe.
The conquest of the earth, which mostly means the taking it away from those who have a different complexion or slightly flatter noses than ourselves, is not a pretty thing when you look into it.