With the right motivation, sure. It is the right motivation that is hard to come by for most of them. So, without making it too difficult and philosophical, I would say not often and not completely. It is a sort of an addiction. While temptations are there, slippage is always a possibility.
They can try but I think old habits die hard.
i guess no, its said that the 3w's of destruction is woman, wealth, wine.
Everyone can change - they just need the right help & encouragement :)
Not a chance in hell, nor can a serial dater/sex addict like myself.
Any mental change is possible, it simply depends on the person and their influences. I will say, however, that ba<x>sed on court records most do not change. Don't hold your breath.
Ask Matthew Fox....