Back in the early days (2002 or so) the guys on Sean Cody didn't even kiss. That would be way too gay. They got blown (usually by Sean) and definitely didn't look like they were enjoying it.
Ten or so years later and they are shooting cum into each others asses and then eating it.
CF was a slightly shorter journey, but equally as dramatic: When Lucas first had sex with Dirk (I know Phunk remembers Dirk) in a scene called "Straight Stud Love" in 2005 it was just about the hottest thing ever - before that the straight boys fucked the gay boys or got blown by them, but the did not fuck each other nor did they show any kind of affection.
And now they're having boyfriend sex.
So the question is: Are the barebacking and internal cum shots the last gasps or just another stop along the way?