taste is the gimme in these. it only starts to get hard AFTER that point. sight is extremely useful. hearing is extremely useful. touch is necessary. smell probably is the 2nd lowest on the rung, even though it's pretty good to have. taste though is easily the most expendable.
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The King Wang.
Listen up Urinal Cake. I already have something that tells me if I'm too drunk when I pee on it: My friends. - Colbert.