I'm not sure why anyone would want to sit and wipe their ass.
It's better to half-stand, bent over. That way you don't have to dip your hand below the seat level (unless you want to risk brushing your hand against the lovely stuff around that entire area of the toilet), and you won't squeeze the...remains against your cheeks.
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The giant three-phallused phallus of Uzbekistan will one day squirt the cosmic jizz of revenge all over Canada.