Just don't get caught

I was in the showcase of people of should have never mated a.k.a Wal-Mart today. I was passing by a middle-aged man and his suprisingly attentive son and I heard the end of the father's words of "wisdom". All I heard was "just don't get caught". That got me wondering what shameful act the father was essentially ok'ing to his soon to be redneck son. Now what could have that first part been...."having sex with your sister is fun","it's ok to make fun of blacks" or "we're going in for the big cheese".