What consenting adults do with their body is their own business.
Bodily autonomy is an all or nothing thing. Whether you’re talking about abortion, gender affirming surgery, taking a dick in the ass and in the mouth at the same time, or shooting meth into your dick. It’s all the same thing.
Then you charge people with the crimes they’ve committed. You hold people accountable for the choices they’ve made. It’s quite simple, in my opinion.