Best summarized by this comment from a reader:
alvinstraight: So the scientific answer is that you can, but only if you eat it straight out of your ass. But if you can do that, won't you be too busy blowing yourself to care about dinner? Signed, Gilbert Gottfried.
I am nauseated and laughing at the same time.
Human Centipede, vindicated.
Conversely, can you enema your own vomit?
Yes, but that's actually more dangerous because due to a curse from the Old Ones and/or original sin, "mucous membranes" don't actually have mucous and are thus susceptible to hydrochloric acid damage.
Nope.
So ass-to-mouth is okay. Phew! #themoreyouknow
I don't like these new menu plans for DNA Pizza
Where do you think the DNA comes from?