A German friend came out with the following the other day when my husband was late for a meeting, due to some side affects of a flu bug:

Don't trust anything, not even your own a**hole.

At one time my brother and I, laughing hysterically, could carry on a ten minute conversation between us, using nothing but our Father's platitudes and expressions, that we could remember from childhood, such as:
Don't get your shirt in a knot
Don't cut off your nose to spite your face
See what you made me do
Shut your cakehole
I'll fix your little red wagon
You'll be laughing on the other side of your face in a minute
Got 'em by the short and curlies now.

Sort of a sad legacy, all things considered......