There is NO logical reason WHATSOEVER to oppose ANY sexual act, if there's no God. People who rejected God's law to allow fornication and adultery -- "Hey, baby, we're consenting adults" -- found that, despite their instinctive revulsion for homosexuality, they had lost all moral basis to resist the homosexual revolution. Now that the homosexuals have won a clear victory, the limits of "adult" are being pushed; there's an agenda to lower the age of consent, and so on.
For that matter, if there's no God, there cannot be any REAL reason to oppose non-consensual sex, other than personal preference. Absurd, you say? I say not... Here's how it might happen: as the pedophiles gain power and push the limits of consent downward, nearly all of the population will grow up with the experience of having been molested.... They'll be conditioned to accept sexual victimization from an early age, and as adolescents or adultes will easily be coerced into whatever sexual act anyone wants. Most "sluts" and gay/bi men are molestation victims; I've known enough of these people and their struggles, to know that the picture I'm painting is not unrealistic. They have so little resistance to sexual advances that the question of "consent" is hardly meaningful any more -- they're too emotionally devastated to say no.
In the end the feminazis will be right -- when that stage is reached, all sex really will be rape. It's not impossible, some ancient cultures were like this. Imagine a coed prison where the strongest male cons brutally subjugate the women, the weaker men, and any children that are born among them, and predatory sex is almost the only sex there is.. That, friends, is a picture of human nature in the absence of law.
There is, indeed, a slippery slope, with a lake of fire at the bottom.
Huh? Where's the illogic in saying that when you do away with rules, the rules go away.
Go ahead and split hairs with lectures about correlations and causalities, it doesn't matter. Gay marriage, sex between adults and children, beastiality, intentionally breeding children with physical handicaps, etc. are already on the agendas of various activists who are being given full hearings in academia and some government circles.