You're normal. There are a lot of bisexual men and women. I suggest some counseling to try to learn more about it and deal with it while you are still young.

It sounds like your dad's sex education comes out of the bible. The authors of the bible knew nothing about a lot of things. It's better to learn about sexuality from those who have a scientific background and good values that value the live of all people and that recognize that all people are different.