Using the colloquial term "RAINBOW" to define an individual of @Killing Spree 's lifestyle choices in regards to seeking alternative romances is both amusing and often quixotic.
Yet I divert from the topic designated by the title of this thread; Why is Killing Spree gay? Beyond his thirst for white wine, hunger for salads and his lust for (mostly) human males?
In the modernized era the word "gay" has abandoned it's definition of "happy" as it was used in the dawn of the 20th century and either states one is homosexual or of irritating character, occasionally with the both intertwined as to suggest the "gay" is in fact not worthy of being acknowledged as a man as they seek men to protect and love them. And it is in this description that we see parallels to Killing Spree's lifestyle.
In a thread posted earlier today, one listed how another individual may be "gay" for "thinking milking bulls is cool" but this could also be a perverse and deviant preference in regards to what constitutes pleasurable entertainment. However, this basis of criteria could symbolize psychological flaws that may or may not include actual homosexuality. In the case of Killing Spree, however, there is overt overtones and undertones in his mannerisms that suggest his primary goal is to court men for romantic entanglements.
It is with this in mind that I, the esteemed medical professional Mr. Elmsby, declare Killing Spree to be a HOMOSEXUAL.
Any supporting or opposing arguments shall now be permitted.