Is that Spaceman Spiff comitting public urination??

I'm always confused when I see a back window sticker of Calvin pissing on a Ford / Chevy logo. My first thought is, "Huh? We're still doing the Calvin stickers?" and My second thought is, "Huh? People have a proactive truck preference that runs so deep that they must launch a smear campaign against other truck manufacturers... which they also do not own stock in or work for on any relatable level?". Then I usually pass a Denny's and start thinking about destroying my cholesterol with a Moons Over My Hammy.