When I hang my washing out on the line, I like to ensure three things:
(i) all items of a similar type are kept together (socks with socks, pants with pants, etc.)
(ii) all items are hung according to size (the largest things first)
(iii) all items are hung inside out, facing the same way and the same way up.
In addition, I like to make sure all of the pegs are wooden and of the same type; or, if using the plastic pegs, that they are all the same colour (preferably blue).
According to a full-figured friend of mine who likes to boast of having a degree in psychology, this meticulous attention to detail and concern with aesthetics isn't a noble attempt to impose order upon a chaotic world and give style to an otherwise drab and dreary domestic chore; rather, it's a sign that, like Sheldon Cooper, the fictional theoretical physicist played so brilliantly by Jim Parsons in the CBS television series The Big Bang Theory, I suffer from a mental health issue known as obsessive-compulsive disorder (OCD).
Technically, she means obsessive-compulsive personality disorder (OCPD), which is clinically distinct from the above, though I hardly dare correct her for fear that she regards this as further proof of the condition; a condition which, in my view, is neither undesirable nor unhealthy, but is rather egosyntonic and characteristic of all great artists, dandies, philosophers, and others concerned with achieving a level of perfection.
My friend might find pleasure in doing her laundry in a carefree manner - recklessly mixing the colours with the whites, hanging things in a higgledy-piggledy fashion, folding items in an incorrect manner - but she'll never know how to give birth to a dancing star or understand why it is that nothing tastes as good as skinny feels.