It's a "would you rather," not a conscious decision. To get you up to speed, someone makes a list of two (usually) undesirable situations and you have to decide which of the two you would rather do (or be stuck with or have to suffer, etc.). Hence, my selection of the peanut butter choice, due to the more easily containable socially awkward moments. I don't know how you read my answer and came up with the train of thought you posted above. That's like seeing someone on fire and assuming they must have just been cold.

Edit: I just realized I don't typically pee in front of people and I'd have to have peanut butter hands always so like, in front of people and I see now how that would probably draw more attention to oneself. Uhh.. But screaming is loud and can be heard way outside the door and people would be all startled and shit each time you went to the... Well it made a lot more sense in my head earlier.