What is reason why "alcohol enemas" and "vodka tampons" intoxicate someone faster and pose a greater risk factor than injecting liquor through the mouth?

An "alcohol enema" is the term coined for the process of "placing a small tube in someone's rectum and pouring alcohol into the colon" according to Jacque Wilson of CNN health. Typically, alcohol is ingested through the mouth where it will be made less toxic in our stomachs by an enzyme present there. Basically, when alcohol enters the body elsewhere, it cannot be broken down by this enzyme and therefore is more directly affecting the person. In the case of an alcohol enema, the liquor would be immediately absorbed by the lining of the colon into the bloodstream. There is a greater risk factor with these enemas because once the alcohol has entered the body, there really is no way of the body rejecting it's toxins. In other words, you can throw up alcohol that is ingested through the mouth if the body rejects it; however, if alcohol enters the body through the colon, there is no way for it to exit, even if the body is rejecting it (Wilson, 2012). Another risky way some people are getting drunk is with "vodka tampons"and "eyeball shots". These, like enemas, are risky because the lining of the vagina, anus, and eyeball sockets soak in alcohol much more quickly and willingly than regular skin does (Lovett, 2012).  

Holly D R

Sources:

http://www.cnn.com/2012/09/26/health/alcohol-enemas/

http://abcnews.go.com/Health/shocking-ways-kids-drunk/story?id=17281602