In the wild certain animals literally eat their young.
At this point he knows Marty is full of shyt, been cheating on his wife, etc. that's why he said "what, you going home to play with the kids?"
He's basically saying as long as you pretend to be good, it doesn't matter to you people how bad or full of shyt you are. As long as you have a cause to run after, or "salute", you can be as hypocritical as you want to be. That's why he got so offended when Marty insinuated he was acting "off" over not getting laid. He's out there investigating the Yellow King shyt and Marty is thinking he got something as trivial as p*ssy on his mind.
Fred.