Well, he was... I think they're all being sarcastic when they call eachother gay. Does Chris really think Joey is gay? No. But he still jokes about it, because Joey likes musicals so much. I doubt Lance really thought Chris was gay, come on. And he knew Justin had a girlfriend, he didn't think he was gay. But he maybe called him gay, because that's how you rile other boys up - you tell them you think they're gay.