Absolutely.
If one was truly born heterosexual (and yes, you are BORN with an inherent sexual preference. I don't really get how people don't understand this), no amount of reading about "Heather's 2 Daddies", watching a drag queen in kindergarten read a book, or multiple viewings of the Rocky Horror Picture Show will turn you into a gays. lol
https://vaden.stanford.edu/medical-services/lgbtqia-health/sexual-fluidityIt is entirely possible for a heterosexual person to become gay due to external influences.