I just discovered this post, and I'm a fan of the Used (well I used to be) Anyway..
I adore this song, it's angsty and metaphorical (excuse my spelling)
Cherryfreezy61, I agree with you that there are references to 'boysex' or homosexual behaviour as it's pretty taboo in this day and age, just like drug use. Bert loves taboo, we all know this...however, I don't agree that it is as stright up as you say.
I think in this song he is refering drug abuse and sex. He uses the gay sex as a metaphor. Drugs fuck you up. In the beginning of the song the lyrics depict two characters, one; an experienced drug user trying to become sober and the other, character two; a younger niave drug abuser.
"When the shirt came off, it was all in time" and "Keep the mask aligned, get it up in time." could represent the facade that the character smust hide behind in order to keep the secret, the drug allows them to let go and be themselves, no pretending.
"there's a space between vallyes, try to catch a vibe" A space between a valley is a mountain, which represents the high and lows of the drugs effect. When you're a user, you're always trying to chase a high, thats all you're after - relief.
"When your pants came off and I turned you over " "Now the room is shaking, and your changing places, and I switch my pace" This is the referal to 'boysex as you suggest, however, to me it represents that in the beginning, character two; was in control of the drug, it was recreational, a little fun, experimenting just like gay sex is. However now, the trading of places, the drug is now controling the character, it's slowly becoming him, and he can do nothing about it. It literally fucks him.
"And my breathing races - when you mention blue..." The character has come to the realization point. He's an addict.
So now the song has reached the end and character two, has now turned into character one.
Sorry if thats a little weird, it makes sense to me lol. But thats what I took from the song.
Basically the underlying message is - don't take drugs kids. They'll fuck you.