A Breakfast Scene

The Pit is always chastising me for wandering around the house semi-nude, or, depending on the occasion, completely starkers.  So you can imagine my delight, when on this trip to visit my family, I came downstairs in the morning to the following tableau:

The Pit, standing at the kitchen island with my dad, having breakfast.  The Pit dressed normally, but my father wearing only bright green speedo underwear and a rather small short-sleeved collared shirt, which I'm fairly certain was worn only for a place to put his cigarettes.

Why was this considered appropriate breakfast attire?  Why didn't he wear shorts instead of a shirt if he needed pockets?  These are all excellent questions, but I do not have answers for you.  All I know is that The Pit should be grateful that the only Peachy family member he has to regularly see half-naked at breakfast is me.