A short list of them:
"No, son, I'm not cheating on your mother. What gives you that idea?"
"No, son, those aren't pictures of me boning a woman who isn't your mother. That's just porn, which I raised you to not be squeamish about."
"No, son, I'm not going to put off divorcing your mother and leaving you to to pick up the pieces while there's still hope. I'll leave tomorrow."
Don't take the above too seriously.
"The Crawling Spleen from Angry Beavers is real and will kill you if you don't behave, mister."
"We can make it just fine with $200 in the bank. We just need to cut back is all."