I think "fuck mouth" is the intended mechanic to START the blowjob. Unless I'm mistaken?
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Sorry, I may have meant "Rut Mouth". There's both a "Fuck Mouth" skill, and a "Rut Mouth" skill.
The animation was labeled "Fuck Mouth", so I assumed the skill that called it would be labeled the same since the animation that the "Rut" skill calls was labeled "Rut". So if it was "Rut Mouth" that I had meant, then same deal. The point is that the drone technician is using "Rut" on princesses with blowjob status when he should be using whichever skill calls the animation labeled "Fuck Mouth".