Well, assuming your goal is to convince your child that love is a requirement for sex, then I would orchestrate a mis-attunement event for the purpose of creating attunement between you and your child.
So, in a totally impromptu setting, start complaining and showing shock over a story that you’re reading in the moment. Not a story you already read. Not a story you heard about.
It must be a story that they just happen to catch you reading in the very moment. Your shock needs to be acted to the level that they remember it afterwards. Cry, just for the impact it will add.
Use phrases like “Oh my god I can’t believe this person did this to another person”. “He REALLY took advantage of her”. Be emotional in your presentation. Be angry. Mention how kids can be so easily manipulated. Say things like _“I hear that kids who suffer this kind of abuse can carry the emotional scars for the rest of their lives”... “God I wish there was a way to stop this sort of thing”!!!
It’s important your child sees how upset you get when hearing about this happening to a complete stranger.
Then encourage them to speak upon the matter by asking them if they know anyone at school who has endured this. Ask if the school ever talks about these horrors.
Your child is smart, and they will want to attune to your emotional level. You haven’t attacked them. You’re not preaching to them. You’re sharing your shock and horror about what happened to someone else. About a subject they may not know about.
It’s a basic psychological manipulation tactic often used by your friendly neighborhood cult leader. Pretty standard stuff. One of the many arts of fascination and mesmerism.