Your aversion is completely understandable. As a bit of incentive in addition to how much better you would feel, i have seen in multiple sources that combining your Water Fast with enemas makes your cleanse 2-3 times more powerful (2-3 x faster elimination of toxins). The majority of your toxins are in your colon. Helping your body to rinse those out (the quickest easiest way) allows it to aim it's cleansing and healing powers elsewhere.
You might research it some. I think most people are adverse before they do it, but honestly it's not a big deal. I actually draw a nice warm/hot bubble bath, lay there and take the 2 quarts of body temp water in (distilled is recommended), lay there some more and get up when the urge to eliminate arises. I just walk wet to the toilette across the towel on the floor :p.