That'd be Turdophilia! (i think AKA skatophilia) - it'd be a bad profession to enter with a phobia of turds! Bit like an acrophobic steeplejack - bad idea!

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Landrovers are really fun
There's one out there for everyone
You will get your thrills and spills
but the red ones, they don't go up hills
Landyzone - MANY LAUGHS, HAVE THEM!