Surely you understand that these things initiate force.
And so they are wrong solely by virtue of the fact that they require initiation-of-force in order to take place?
Is there no other way to understand the wrongfulness of child rape, for instance, than as a projection of force? The force part doesn't seem to be the only, or even the main reason why such acts horrify us; what horrifies is that someone would choose to damage a helpless, innocent child (physically, emotionally, psychologically, spiritually) simply for his own cheap self-gratification.
The force part is a necessary, yet comparatively negligible part of the great enormity of such crimes. It is the means to an end; yet in the final analysis, it is the end that horrifies us.