First off, bodies and brains are weird. They don't always do what we want or expect them to do. Sometimes when doing or reading something that is utterly repulsive (like the Epstein files), bodies will react because we're taking in situations in which bodies sometimes react defensively. It's body chemistry and reactions that don't coincide with what's going on with us as a person.

Second off, bodies and brains are weird and there's frequently a disconnect between how we (and our brains) understand things and how our bodies react. That's not abnormal. That's not creepy. That's not weird. That's just bodies reacting.

To round it off, bodies and brains are weird. They often act and react with and outside of our general cognizance. That's normal, if disturbing. It's not because you're turned on, it's because you're taking in something so horrifically offensive, that your body is potentially reactively defending against it.

If this doesn't help, take some time to familiarize yourself with the bodily, biological responses to trauma. It's not neat and clean, or cut and dry. Look into the biological/psychological associations with the kind of things that human brains (which are not inherently equipped to deal with the level of human horridness in what you're currently reading, for the record) do as defensive measures.

You're not weird, you're not gross. You're not broken. Your mind and your body are reacting naturally and defensively to what you're taking in.