I mean your complaints don't really sound like they would cause any sizeable dent to your quality of life. They just seem like opinions.
It's all relative, I think. It's easier to notice petty issues and exaggerate the suffering when you don't have anything actually wrong in your life.
What about my mother idea?
I think parents are responsible for shaping us more than we currently know, but I doubt being nurtured by a mother directly correlates to finding women more attractive. It has to come in equal and opposite proportions... so basically for every amount of wanting to be nurtured there needs to be those who want to do the nurturing.
People still act like someone will catch "the gay" by watching 2 guys or 2 girls kissing.
No, it's not that. It's just that straight couples are the default, much like white male is the default in America. When you're the default you don't have a lot of opportunities to relate to the not default. Media provides ample opportunities for minority ethnicity members to relate to generic white people, but not for white people to relate to minorities. Women are expected to relate to male protagonists no problem even where there are massive differences in how the genders think and operate, but men are not expected to relate to female protagonists with nearly as much regularity. And I think it's the same thing with sexuality.
You can't catch the gay and I don't think anybody actually thinks that. But when you're not used to seeing the beauty in homosexual romances because you don't have enough experience in the matter then it's off putting. It's unusual and even in some places described as wrong, so people are averse to normalizing it. It's not about worrying that people will turn gay, it's about having to learn to accept that gay people are normal.