I am super confused about my sexuality

For some reason ever since I saw a gay porn video on the internet with my wife I have had very gay thoughts. I have talked with my wife about it quite a bit since (this was about 5 months ago). She is very understanding of my feelings and is really trying to support me. The thing is though is I do not know what I am. I enjoy watching all kind of porn like straight, bi,and or gay (I prefer bi more times than not).

She will also put on a strap-on and we will have anal sex. The thing that bugs me the most is, If I see a penis on the internet I get very aroused. I find men's bodies very attractive and have thoughts of having sexual encounters with men often. I love my wife and love our sex life, but I don't understand why I feel this way or why I get aroused by men's bodies. Its just their bodies am attracted to not the face. My wife is the only person I have ever been with, my wife is perfect for me, but I also wish she had a cretin male genitalia. Why do I feel this why, is it normal,and does it make me Bi sexual?

Thank you for your answers they are appreciated.