We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness. — That to secure these rights, Governments are instituted among Men, deriving their just powers from the consent of the governed, — That whenever any Form of Government becomes destructive of these ends, it is the Right of the People to alter or to abolish it, and to institute new GovernmentGod gives us rights that are "unalienable", that is, even if we wanted someone to take them away, these rights cannot be removed from us. We do not have the ability to throw away these rights, nor does anyone have the ability to strip those rights from us.
Now, people can kill us. But, when they kill us, they violate our rights by killing us. You can take the thing itself, but you never actually have the right to take it.
So, let us say you create a legal contract wherein you become someone else's slave, perhaps for some payment, perhaps for some other reason. It doesn't matter. That contract cannot be enforced in a court of law. No matter how much you insist you want to do it, you do not have the ability to consent to become a slave. No American court would recognize the contract, nor would they recognize your consent as valid.
Keep in mind, however, that Muslim courts would recognize a right to self-enslavement precisely because Islam does not recognize that individual people have unalienable rights.
Unalienable rights come from God, they are endowed by our Creator. The Founding Fathers were not Muslim or Hindu or Buddhist or Taoist. Insofar as they were familiar with any religious tradition, it was purely and only the Christian tradition. They lived in a purely Christian culture.
The Declaration of Independence does not list all of our unalienable rights, just three. But, as the Founding Fathers pointed out in the Declaration, we can determine what our other rights are by looking to the source of our rights: the Christian God.
Once we do that, we can see not only what rights we have, but also what rights we do not have. So, just as no one has the right to contract themselves into slavery, so, in a like manner, no one has the right to consent to homosexual activity.
Now, anyone can engage in homosexual activity, but no one has the right to do so. In that sense, homosexual activity is identical to rape or slavery. It is an act that cannot be consented to. No one has a right to engage in it.
Again, keep in mind that just as Muslim courts recognize a right to enslave others, so Muslim courts recognize a right to rape, even a duty to rape. For instance, Islam recognizes a duty for the jailer to rape a virginal woman in prison facing execution. Virgins cannot be executed. A virginal woman must be raped in order to carry out her execution and keep her out of Paradise. Thus, the jailer has a duty to "marry" and rape his prisoner before she is executed. He is advised to repeat verses from the Koran during the rape, so as not to become contaminated by her impurity while he helps guarantee her eternal end.
Only Christians believe in divinely endowed, unalienable rights. Islam is what a culture looks like when it fails to recognize the Christian concept of divinely endowed, unalienable rights.
Now, American courts have begun to imitate Muslim courts. American courts now recognize a right to rape in certain circumstances. Because homosexual activity cannot be consented to, every act of homosexual sex is an act of homosexual rape. No one has a right to rape. But, American courts, like Muslim courts, now recognize the right, under certain circumstances, to rape.
In short, American courts are now no more nor less insane than Muslim courts.
Thus, we can now see the homosexual "rights" movement is simply the American version of sharia law. If you've ever wondered why liberals like sharia law, you have the answer. They may or may not like the details, but they very much like the principles.