Second, don't bother relying on your wife for this, a daughter's chastity is the father's responsibility. These are easily fixable in the future. But the general problem is hard. You didn't mention your daughter's age, but if she is young enough then I recommend taking your family to some conservative religious service weekly. Women are herd animals and are influenced by the people they see around them. Logical arguments are useless with women, but telling your daughter that many men just view women as pieces of meat (sex objects) may have some effect.