Edible body paints are fun

They definitely have some pros & cons though.
Start with the cons: Depending on the bran,d some are "thicker" than others. The thicker it is, the less you want to use or your tongue might fall off trying to clean it off. The "pen" types and some brands tend to be too thin and they can be thickened up by mixing with light corn syrup - but only use a little bit. Some stain sheets so use a towel you're willing to throw away. I haven't found a brand that isn't sticky, so shower after is a must! Like whipped cream, if you fall asleep after all that licking, you'll wake up in the morning with a sticky and "spoiled" type smell. Don't use your fingers to apply, use the brush. Also, make sure the area is fully free of stray hairs or animal fur - vacuum well before using, no one likes hair in their food. Taste test before using, some brands are sickly sweet and others have a flavor I can only describe as flavored condom. Finally, shave before using, once again hairy food is no fun.
Now the pros: Definitely will slow someone down to focus on foreplay. Great way to hint at typically missed erogenous zones by carefully choosing where you apply it. If there's an area that needs extra focus - lay it on a little thicker, but not so thick that tongues fall off as mentioned above. Awesome way to bring a little creativity by carefully painting on a bikini or just little hearts and smileys. Don't waste the photo opp - body paint looks great in pics. Experiment and mix flavors and don't forget to share the flavor mixes with your partner
Hope this helps & have fun!