It’s a comics exaggeration. The gag is that Charlie Brown’s pitches are so weak/bad some batters can hit the ball back at him with enough force to upend him and knock his clothes off.
It does! Here’s an actual Pinky response: “I think so, Brain, but how are we going to make pencils that taste like bacon? Or maybe we should make bacon that tastes like pencils.”
It’s more detail than usually seen at this point in the strip. The ’50s strips had quite a bit of background, but by the ’60s Schulz had gotten pretty minimalist.
Gum, fish, meat, wigs, etc.