Someone on Etsy is selling these Toilet Graphics for $20 a pop. As you can see they're stickers you slap on the john to add some flair to otherwise plain white porcelain. There are a number of options like SCUBA divers, aquatic life, bikes and scooters, and my personal least favorite -- cowboys. Thankfully when you have the lid up you can't see him. Because one time I tried to pee with a real-life cowboy staring at my six-shooter, and it was a very Brokeback experience to say the least.
Toilet Graphics Add Some Color to Your Latrine [uberreview]