Joking Proverbs

If I am seen, I am joking; if I am not seen, I steal. (German Proverb)
Joking must have its proper limit. View proverb
Latin Proverb
When the thief is seen [stealing], he says he is joking; but when the thief is not seen, he steals. View proverb
German Proverb
It is past joking when the head's aff. View proverb
Scottish Proverb
Never descend to vulgarity even in joking. View proverb
Latin Proverb