I'm often surprised by whom I'm attracted to. But that I'm attracted to guys generally? No, that never surprised me.
I've known since I was a little kid. I don't easily relate to figuring it out late in life but what has surprised me is how many people tell your story. I never would have guessed that.
I don't know if that's repression or what. I might be able to somewhat relate to it like a memory lost. I notice this when I'm with my childhood friends. Each one of us remembers vividly times of all of us together that the others don't recall at all.
That's a bit different than forgetting something or never having known about yourself. But it is a personal experience some of us forgot. And certainly we discover things about ourselves throughout our lives. Sex seems a bit basic but even if we experience life similarly, realizations don't occur in identical order.
I've got a friend discovering his varied sexuality only now in his 50s. You'll have 25 years more fun than that. Enjoy it.
Sometimes what we see depends on what we look at.