All those acts are sodomy because the essence of sodomy is that it is unfruitful (in principle, not just by accident). The use of birth control converts the otherwise natural, possibly fruitful act into one that is unfruitful. Thus, contracepted sex acts are a species of sodomy.
I figured there was some sort of bizarre “Who are the Rosicrucians?” Catholic, sexual transsubstantion, mystery explanation here, Art; or Lewis Carroll “This word means what I intend it to mean, and nothing more.” explanation.
I just didn’t want lurkers thinking that all of us agreed with your position that swallowing a pill turned a simple “Slam, bam—thank you, Ma’am!” missionary-position roll-in-the-hay into a particularly salacious, even barnyard tinted, “Dear Penthouse” letter.
Heh