Many fruits start to ferment a bit, some even while still on the trees. For example orange juice normally contains a small amount (normally < 0.1 % vol.) of alcohol too. And some berries that grow in the dunes here in Belgium can make the birds who eat them tipsy when they are ripe (the birds fly a bit erratic during that season...).
The "smell" might also be something you associate with alcohol because you often smell it while sensing/using alcohol (technically you can't "smell" alcohol, as it's odorless, but you can "sense" it in other ways).