Great post, Daniel!
But one point.
Sex is disgusting except in two circumstamces:
Two physically perfect people.... and yourself!
Otherwise Your gradparents having sex? UGHHH How about tortoises?
"Come on baby! Gimme some shell!"
The point is imagining someone else having sex usually is a HUZZ! or ridiculous
But to them it is beautiful! and unless you are joining in, it is not your business.
Just as it is no one's business about your sexual loving.
The problem with being a parent is that to them, just last week you were seven years old in second grade and had just had the training wheels taken off your bike. Back then your parents were completely responsible for everything about you.
I'm a middle-aged man seven years ago I was still a middle-aged man. and it seems like last week. 14 years ago I was 32! Old by your standards! and you were just born. Your parents are struggling with the physical and emotional and mental growth you are showing!
They have been taught to Oppress gay people by their church. They are as much a victim of homophobia as you are.
You will come to be their teacher. You will have to help them to find courage. This is a big challenge for a 14 year old, But you will be up to it.
Just as each of us has our challenges set, we can either fear them and dread them with aversion or we can meet them giving all we have got to champion our spirit. At 14 you have trmemdous spirit! You will make your parents and yourself proud!