Societal attitudes toward homosexuality vary greatly in different cultures and different historical periods, as do attitudes toward sexual desire, activity and relationships in general. All cultures have their own values regarding appropriate and inappropriate sexuality; some sanction same-sex love and sexuality, while others disapprove of such activities. As with heterosexual behaviour, different sets of prescriptions and proscriptions may be given to individuals according to their gender, age, social status and/or class. For example, among the samurai class of pre-modern Japan, it was recommended for a teenage novice to enter into an erotic relationship with an older warrior (see Shudo), but sexual relations between the two became inappropriate once the boy came of age.