In general, I think it does sort of bother me that an affectionate relationship between two men is often automatically categorized as a gay one even if it's not.
I'm also bothered when there's a picture of two male celebs hanging out and tons of gay guys are suddenly screaming that they're gay. I think it feeds into the straight fear that gay men want all straight men to be gay.
Ideally it'd be great if most straight guys didn't care if people thought they were gay, but I think when some gay men make such a big thing out of any affection between two men as meaning that they're gay, there's more apprehension about being comfortable with homosexuality. Of course it's not just gay men who make a big deal out of affection between men, though.
I'm reminded of that commercial from a while back where a bunch of guys are watching sports and there's a touch down or something and one guy hugs one of the other guys and then all of the other guys move away from the offending hugger.
"The gods who nurse this universe think little of mortals' cares. They sit in crowds on exclusive clouds and laugh at our love affairs. I might have had a real romance if they'd given me a chance. I loved him, but he didn't love me. I wanted him, but he didn't want me. Then the gods had a spree and indulged in another whim. Now he loves me, but I don't love him." - Cole Porter