There weren't many gay people when I was growing up. At least not openly. I was first introduced to some gays at a gay bar. They basically made me feel like a juicy steak in a meat market (not in a good way). Several comments about my dick within 10 seconds of meeting them.
Today I have many gay friends that I enjoy their company but that was a huge setback for me.
You know what, I never treated women that way but I certainly gained a lot of empathy for them after that.