Board Thread:Theories and Speculation/@comment-27082825-20150116155842/@comment-25349026-20150123223418

affinity [uh-fin-i-tee]

noun, plural affinities. 1.a natural liking for or attraction to a person, thing, idea, etc. 2.a person, thing, idea, etc., for which such a natural liking or attraction is felt. 3.relationship by marriage or by ties other than those of blood (distinguished from consanguinity ). 4.inherent likeness or agreement; close resemblance or connection. 5.Biology. the phylogenetic relationship between two organisms or groups of organisms resulting in a resemblance in general plan or structure, or in the essential structural parts. 6.Chemistry. the force by which atoms are held together in chemical compounds. adjective 7.of or relating to persons who share the same interests: to arrange charter flights for opera lovers and other affinity groups.

Synonyms 1. partiality, fondness; sympathy, leaning, bent. 4. similarity, compatibility.

dictionary.reference.com/browse/affinity

There is nothing to indicate that one could not have an affinity for more than one thing in a grouping. However, by the definition it would not make sense to have an affinity of 3 or more of a grouping of say 5. Affinity is not preference which is a choice. Affinity is more descriptive of an inherency.

Either way, I would chalk this one up as another example of poorly explained shit by the author, where the original canon source material of the manga differs from the anime. In this case the anime is explicit and the manga never mentions it. Deference is given to the manga as its the true canon source, but since its not discussed its up to the fanbase to intelligently determine/come to a concensus until/if such time that its clarified in a databook or something.

tl;dr - this shit ain't worth a bitch fest.