"Being in an adult film is not a big deal to me," Montana Fishburne, 18, tells PEOPLE. "It's something I always wanted to do. I have always been comfortable in my body and with my sexuality."
And no, she's not hoping her adult film, which will be released by Vivid Entertainment on Aug. 10, will spawn a mainstream acting career. "I am not in porn to get into acting. I am in porn because I wanted to be in porn," she says bluntly.