Hey DK... I wish I could have 2 beers. I might be able to, if like you, I planned for it and kept vigilant and made sure my head was in the right place before I did it....
But what I know from MY experience, is that at some point, I will tell myself that well, I ALWAYS handle beer just fine... I can just drink some... without all the work of preparing and monitoring and vigilance.
Damn.... next thing I know.... I don't know.
Controlled drinking is too f-n hard for me.
I don't think I have anything like OCD... just obsessive thinking, and my solutions for that are to change gears/location/activity. Have you tried meditation?