"Did you know you were gay" - I'm bisexual like many others who visit the Straight and Bisexual Guys page.
When growing up, I had a fascination with dicks, and my ass. And some cute guys' bodies - I wanted to feel them, cuddle them, but I absolutely could not, or even show any desire to do so. I didn't have a word to describe my feelings or help me to understand myself. All I knew was I had to be careful. I grew up in a backward, conservative rural town in the 1970s. To be gay (with its various disparaging titles of the time) would have meant ostracizing, beatings, or worse, most likely the end of a normal life as I'd known it.
I was straight-leaning, mostly sexually attracted to girls (and still am), but there were dicks, and my fascination with them. And the pleasant feeling I'd get in my ass when I poked things up there. I enjoyed getting naked outside, like many of us, and like others have commented here, but it was more about freedom and feeling the air on my skin than anything sexual. But there was always the urge to fondle the dicks around me. I had my first sexual experience with a girl in my teens and led the straight life for many years.
I was well into my 20s before I experienced a dick-shaped toy, then a real flesh and blood dick. It was only some time after that, that I shook the childhood phobia and admitted to myself that I was bi.