We are all, to some extent or other, hard wired to be competitive--and testosterone only serves to fuel this.
At it's most primitive, it is sexual competition--who has the best display, or who can best fend off other, competing males.
But we are more complex social animals. So, "faster, higher, stronger," became our competition. Even today, sport provides a socially acceptable framework within which to play out this competition.
So, it stands to reason that some of us (whether gay, straight or otherwise) will, when confronted with another man who we perceive to be more competitive than we are, will feel uncomfortable.
I'm not sure that ASDs will have a profound effect on this, any more than any other individual characteristic. At the end of the day we are each individuals, with our own unique psychologies.
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--James