Well basically, the dud who is drinking the alcohol for a small amount of time will be intoxicated and he will enjoy the stuff. As it's he's first time, he would not know how much to drink, so he'd probably get himself drunk.
If the person knows the negative effects of alcohol, and if the person can control himself, then he won't go for alcohol again.
But, if he lacks self control, then he will become an addict. To get rid of a strong bad habit like being addict to alcohol is never easy.
I hope I helped u.
:)