Maybe I need to read this again because this was confusing.
Best Posts in Thread: Why Passing as Straight Is Not a Privilege
I only read it once and I totally get what he was trying to say. I think @ColumbusGuy is right, this is essentially what @NickAuzenneNOLA has been saying since he started posting on The Boards.
Some of this is also what @Ockydub and I have been saying since we started the site: Just because we are masculine, that doesn't mean that we don't face hardships and feelings of not fitting in anywhere as gay men, even among other gay men.
I totally get what he said in the first 2 paragraphs: He subconsciously acts more "straight" around straight men because they are straight. Not to dissimilar to people from the deep south whose accents suddenly subconsciously become more heavily pronounced when they re-visit their home towns.
When he's around his feminine gay friends, he "joins in" on their flamboyancy and terminology, making him appear more effeminate.
As for the rest, I can see what he means. "Privilege" may not have been the word he was looking for...It seems that he meant that Bisexuals (especially bisexuals like he and @NickAuzenneNOLA who appreciate both straight masc and fem gay worlds) do face crisis of identity from external sources who don't understand and prejudge/stereotype them.