Most sexual orientations are innate and cannot be easily changed. Only this person can judge his sexual orientation. Sexual orientation and feelings are 1. If you insist, it will only hurt them, make them feel insecure about themselves, and even hate you, which is counterproductive. Imagine how to educate 1 heterosexual, make them realize their "mistakes" and correct them, and become gay.
Another friend on the second floor, do you think he will become gay if he shows naked photos of the same sex to 1 heterosexuals? That's ridiculous.
I hope my answer is helpful to you.