Circumcised men are in the minority in regards to the world as a whole, the only reason it is not exceptionally rare is that both Jews and Muslims do it to their children without giving them a choice. The reason most americans do it is outdated medical knowledge.
Yup, but it's still one third of the world xD
Mm I had a cousin who had to get it done due to possible hereditary family condition; forget the name but it was a skin infection on the D. Might've been one of the ones here:
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And Hm... Can futanaris be considered gay to none but hermaphrodites, or are they gay to everyone who likes them?
Being circumcised due to medical condition - that's a different thing.
Getting your dick cut due to religious or any other reason - mutilation.
As for the futas... They have both organs, so a person attracted to one would simply be bi-sexual. Personal preference for male or female parts, depending on sex of a subject, would make them turn more into straight or gay. That's when we use a scale with values between those three (straight, bi, gay). Also, no, there is no need to create a new word to describe someone who is bi and leaning more to the straight side.
Futas themselves... Depends, if we look at chromosome sets of a certain individual, then it can only be gay towards a person with same chromosome set. But, TRUE hermaphrodite is such a rare occurrence, it's a case on case basis.
More interesting is a case of why people like futas. While excuse "I like looking at girls, but also at a girl getting fucked by a dick" is just that, an excuse created by your mind to sort everything out an make some sense out of this, it doesn't mean that it may be an actual case. Type of futa you like may say a lot... Sometimes it may be masculine behavior of a futa character... dick size and so on.
Also, mind is known for making excuses for weird stuff that don't follow the norm, often meaning it's something problematic and trying to make it as not problematic. Works only in brain of a person, real world don't care and follows how it is. Take an example from it, stop worrying and lying to yourself xD