But they do.
Alcohol will cause demyleination of the myelin nerve sheath, it just depends how severe your case will be.
If I have a glass or two of wine (or beer), my feet tell me within a few hours. They burn and ache.
If you do not have any negative s/e at all - probably its OK to have an occasional glass.
If you do get negative s/e - hey ! Yer body's telling you something.