Neither alcohol nor sex require one to interface with drug dealers who will certainly try to "upsell" the customer to other narcotics!
And, I think it's just puritanical to suggest that sex is a vice. Around these parts we prefer to refer to it as "baby making". :)
putiannical?
The Puritans pretty much required married couples to have sex and make babies. No babies or no sex were proper reasons for divorce.