Gross but funny question?

Hmmm.....

I could see it now. They do some experiments along your line of thinking. They use dairy cows as test subjects.

With all the gas given off by cows. there would be a rainbow over that farm every day.

There are already dyes that affect the color of urine. I've heard of it being mixed with icing for cookies. You can convince someone he's come down with a horrible disease. There is a story about a GI getting a package of cookies sent to him in camp. He shared (not that anyone could get away with not sharing) and the next morning, the urinal looked as if it was being fed by a rainbow.

Feces can be colored by large amounts of beets or spinach in the daily diet.

Lol, that is a goos one but even if they did come out with something like that I am a whole lot of people wont use it so they dont get embarrassed. The teenage boys will love it though..ha ha.

Could happen.. There have been study into sweet smelling E. coli bacteria to make our farts smell sweet.

Silly, but a little funny.

haha, u had me going till i read 'tinted green'