Concerning the Rules....I'd much prefer to look at them as a set of guidelines, and because we are human, we tend to break them. They are guidelines to obtaining perfection to a much greater degree in this life, and yet, we all fall short.
"Torah", the Hebrew word for all those things we see as rules, is closer to "instruction" or "guidance" than the the traditional "law" or "commandment". That alone indicates that the statements weren't meant for all time; instruction changes depending on the situation -- culture, especially, but even technology.
Which is why when you get to the New Testament, God says those don't apply any more (unless possibly if you're a Jew [and born before the last Apostle died]).
^ i think lev 18:22 about not lying in the same bed with a man as you would do a woman is not a prohibition against homosexuality, but rather something about physical cleanliness of use of the marital bed. That is, you can have male-male sex, but don't do it in the same bed as you sleep in with your wife.
Of course you want to think that; it's a good justification for your actions. But, if you look at the other verses, they all seem to lead to the same conclusion. I am the first person to admit that if Christian God is real, I will be going to hell. I am not going to try to justify my acts as they are clearly against his book.
SW, that's a possible interpretation, but honestly I have to say it's really reaching. "Physical cleanliness" especially is stretching; "cultic cleanliness" not nearly so much. Given that it's in Leviticus, it's a cultic command anyway; the problem is just exactly what the proscription means. There's another interpretation that says the command is for married men; it's possible to translate it not "as with a woman" but "as with
your woman/wife", which gives a whole different spin.
Noting that there have been periods in church history when it was treated that way on a pastoral/practical level, there's a certain amount of credence gained. The prohibition can be then seen as part of the "unclean" system, which didn't mean dirty, but spiritually/ritualistically forbidden; it would be considered "unclean" to profane what was dedicated to your wife (i.e. the penis) by putting it in a different 'receptacle'.
I'd like to take it that way, but I'm hardly convinced by the evidence. All I can do is venture it as a hypothesis and then go searching the ancient literature (modern being too weighted with polemics and wishful thinking), but I don't have the resources I used to for that -- so I'm still reserving judgment.
Another interpretation is that it has to do with temple worship, since a lot of the local deity-cults had sexual activity involved in worship, but that's problematic for a very simple reason: it would seem to condone sex with female temple prostitutes while forbidding male ones, and that just doesn't fit the rest of the book of Leviticus at all.
Choosing interpretations because you like them is really lame; far better to admit you really don't know yet and study on.