Vices are usually pleasurable, at least for the time being, and often do not disclose themselves as vices, by their effects, until after they have been practised for many years; perhaps for a lifetime.
The Complete Works of Lysander Spooner: The Unconstitutionality of Slavery, No Treason: The Constitution of No Authority, Vices are Not Crimes, Natural ... Laws of Congress, Prohibiting Private Mails