masseyman, your post highlights a particular point for me...
It seems that we would do "small" things... things that don't bother our conscience TOO much... like not murder or armed robbery, but yelling at the wife, not having an affair, but drink driving.
Other people won't drink and drive, but will get into a fist fight.
I won't kill anyone or have an affair, but I will say things I shouldn't.
Another person will have an affair but won't kill anyone.
All the above statements actually reinforce for me the fact we DO have control over our actions!
I would have to say this particularly applies to ongoing behaviour, when it wasn't an isolated drunken event, but rather a pattern of behaviour such as that described in the philandering thread.
I would have to rest my case that drinking does not cause a person to be unfaithful... (or do any other action) particularly on an ongoing basis.