I need help. It may be a little TMI inside but I can't really talk to many people I know IRL about this.

I was watching OITNB. There was a scene, they were in a sauna, a gay male sauna. These guys came in full frontal nude. It made me feel a bit weird. I decided to look up something real quick. Nude dudes. I started gaining an erection. Am I gay or bi? I still am attracted to girls aswell. I don't know what this means.