Can you be gay while watching porn and be straight in real life?

Can I. Because when in in the locker room with abunch of guys changeing I don't Get a erextion. But when a girl plays footsy with me I do. And I got one being right next to a girls butt. But do you think is cause I watch to much porn and get bord of it. Cause when I first watch it I got one. But I havnt got very far with a girl in real life.