• The wonder is that any sex ever is seen as non-disgusting.

    Well that’s what sexual arousal is: that state of being temporarily attracted to that which is repulsive. There’s an evolutionary reason to feel like sharing germs is disgusting, but also selective pressure to come together and do just that (to procreate). So we evolved this impulse to want to do what’s disgusting when we’re horny. But the bell curve of what is disgusting for us varies by person and cultural influences.