This is a bit off-topic, but on the 'gay songs that slipped by' front, my all-time favorite has to be 'Lola' by The Kinks. It's a song about a drag queen picking up a straight boy. I think we've probably all known someone who 'walks like a woman but talks like a man':
I met her in a club down in North Soho
Where you drink champagne and it tastes just like Coca Cola
She walked up to me and she asked me to dance.
I asked her name and in a dark brown voice she said, "Lola"
L-O-L-A Lola, lo lo lo lo Lola
Well, I'm not the world's most physical guy,
But when she squeezed me tight she nearly broke my spine
Oh my Lola, lo lo lo lo Lola
Well, I'm not dumb but I can't understand
Why she walks like a woman and talks like a man
Oh my Lola, lo lo lo lo Lola, lo lo lo lo Lola
Well, we drank champagne and danced all night,
Under electric candlelight,
She picked me up and sat me on her knee,
She said, "Little boy won't you come home with me?"
Well, I'm not the world's most passionate guy,
But when I looked in her eyes,
I almost fell for my Lola,
Lo lo lo lo Lola, lo lo lo lo Lola
I pushed her away. I walked to the door.
I fell to the floor. I got down on my knees.
I looked at her, and she at me.
Well that's the way that I want it to stay.
I always want it*
to be that way for my Lola.
Lo lo lo lo Lola.
Girls will be boys, and boys will be girls.
It's a mixed up, muddled up, shook up world,
except for Lola. Lo lo lo lo Lola. Lo lo lo lo Lola.
Well I left home just a week before,
and I never ever kissed a woman before,
Lola smiled and took me by the hand,
she said, "Little boy, gonna make you a man." Well I'm not the world's most masculine man,
but I know what I am and that I'm a man,
so is Lola.
Lo lo lo lo Lola. Lo lo lo lo Lola.
* It's written as 'I always want it to be that way for my Lola', but it SURE sounds like 'I always wanted to be that way for my Lola'.
My first gay friend also swore 'Can't Fight This Feeling' by REO Speedwagon was about coming out as gay. And for one that's indisputable, Elton John's 'Flintstone Boy' (a B side) stands out. It's about a gay guy being cheated on by his boyfriend and it was written during Elton's earlier years.