Kimmi
Alcohol and drugs can magnify what is already there. (for some can slow things as well)
A strong sex drive could become stronger with doc.
With the doc acting on the desires and sex drive... well the stops and limits (common sense) go out the door as the doc takes over. For me... alcohol increased the desire but if I had enough alcohol I would pass out before being able to act on desires.
The loss of common sense I think would be the key point. Under the control of our doc, common sense can become common nonsense. No inhibitions. No cares, no worries...just do what ever.