I'm straight but want to try gay sex.

I'm straight, maybe bi because sometimes I get off thinking about guys or gay porn. I am attracted to girls but some days gay porn or thinking about guys just gets me super horny but I after I cum I am no longer turned on by guys. Even though I watch gay porn I don think I would like actually being with a guy, but I want to try it. I'm scared though because I don't know of any gay guys in my school and I'm not open about it. How do I get lucky with a guy without it coming out?