Why are so many women bisexual?

Anonymous
Why are so many women bisexual? Are they just naturally attracted to both genders?
Is it because women aren't so much attracted to the gender but the person or dont have direct sexual orientations?
Also straight women also seem to claim to be straight but also sexually attracted to women, or find them more sexually attractive.

Sexual orientation Poll:
https://www.girlsaskguys.com/sexual-behavior/q2240732-what-is-your-sexual-orientation

Woman claims straight but sexually attracted to women, responses agreeing:
https://www.girlsaskguys.com/sexual-behavior/q2265640-i-m-a-straight-girl-but-i-never-get-aroused-by-looking-at-guys

All women on the poll claiming they are bicurious or already bisexual:
https://www.girlsaskguys.com/sexual-behavior/q2308589-straight-gay-people-did-you-ever-felt-like-trying-to-have-sex-with

Woman saying she's straight but gets off to hot women, responses agreeing:
https://www.girlsaskguys.com/sexual-behavior/q2329257-is-it-weird-im-straight-can-get-off-to-hot-girls
Why are so many women bisexual?
7 Opinion