When it comes to the chew toys shown here, the joke is on these dogs. They're running around blissfully enjoying their new chew, totally unaware it's giving them a bad case of buck teeth. Some self-respecting guy dogs might not be walking with so much swagger if they knew they had a lipstick mouth with a red pucker rivaling that on any Rolling Stones album.
I bought my dog the toy with the big tongue sticking out (shown in the article linked below) and the joke was on me — he never once played with it. Perhaps he sensed shenanigans and said no dice.
See more dogs who look silly with their toys in their mouths here.