The old "bi now, gay later" attitude still pervades in older gay circles. Regardless, we are who we are... and, for some, identity can change over time. Sexual orientation and attraction can be somewhat fluid. I do recall those old adages... "Suck one cock, you're curious. Suck two, you're definitely gay." And, for many, being AC/DC was more reprehensible than being queer. Bisexual folks are still misunderstood and considered a threat.