Post History
Your MC has never met a living soul, per your statement. This would mean that she doesn't know who she's attracted to - not until she's met them, and experienced attraction. She meets a guy, she's...
Answer
#4: Attribution notice removed
Source: https://writers.stackexchange.com/a/43103 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#3: Attribution notice added
Source: https://writers.stackexchange.com/a/43103 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#2: Initial revision
Your MC has never met a living soul, per your statement. This would mean that she doesn't know who she's attracted to - not until she's met them, and experienced attraction. She meets a guy, she's attracted to him. At this point, she only knows that she's attracted to him. She doesn't know if she's attracted to people with a penis, or if she's attracted to people with dark hair (or whatever his hair colour is) - she has a sample size of one. Later, she meets a girl, and she's attracted to her too. Just as the first instance of attraction was a discovery to her, so is the second. She didn't know she would be attracted to this girl until she met her and was attracted to her. **Since the character doesn't know who she's attracted to until it happens, why should the reader?** The way I see it, the reader should learn the MC is what we call 'bi' at the same time as the character does. (Except that she has no reason to think of herself in those terms: the terms 'straight', 'gay', 'bisexual' are dictated by _our_ society's perception of what's "normal". If the character has not been exposed to "society", she wouldn't have this frame of reference.)