I studied engineering and I have a lot of friends studying in a medical school. For my experience I can say that engineering is harder, but you know that you have 5 years to suffer pain in hell, than you find a nice job and you get a lot of satisfaction. For medical stuff you have to study less difficult thinks but to memorize more. So it is difficult to compare. Engineering is harder but you reach the goal sooner. Medicine lasts longer (as twice as long).
So to the addiction of PE:
I am addicted too, but I found a way to do not change too much my life. I schedule my PE-ing day by day. I have a reminder on my cell-phone that reminds me to train. So I focus my mind all day to other things (work, sport, friends, girls etc.) and in the evening when the cell-phone rings, I know that I have to train and to focus my mind to PE for the next 45mins. After the training I go back to the “reality” and go on living as I did before.
I think this is the best way to work towards the goal (a big healthy penis) without thinking too much about it.
I hope this can help you.
I was just making a joke I now where this type of discussion takes.