illegal immoral or fattening

I am sitting here drinking an ouzo large enough to make the late great Oliver Reed tremble. At the same time, I am smoking a cigarette, which, according to the health warning, has enough toxins in it to wipe out a small army. I am enjoying both of them thoroughly. Why is is that human beings enjoy the things that are so bad for them? Why do I not want to eat twenty portions of fresh uncooked vegetables a day, whereas twenty cigarettes a day come so naturally? Why is it that two portions of fresh fruit a day are a drag, whereas two drinks a day are an utter pleasure? Why is it that I put off going for a healthy walk, yet when I wake up on Sunday morning, I have no desire at all to put off staying in bed?
Answers on the back of a cigarette packet please.
Kalh nyxta se olous

Jamie