In my experience, yes. I previously took it for alcoholism. I found it very broad acting. I stopped drinking compulsively. I also became indifferent overeating, smoking cigarettes, sex, and pretty much everything else compulsive. I've heard of people using it off label to lose weight.

For me it is a very strong & powerful drug, but I also know of others where it did not seem to work. I've heard if you have a family history of alcoholism it is more likely to work.

Were you able to predict when you were going to compulsively have sex, overeat, etc. an hour ahead of time?

I think what he is saying is that when he was taking it for drinking he also noticed it effected his sex drive.

I have no idea. I believe it is used where dopamine is the reward. I know that it is also used for eating disorders and heroin addiction.