Desired number of children / attitude to birth-control, to overpopulation / social desirability scale / experience of sexual education: / which methods of birth-control are allowed by the Pope / attitude to church's position on birth-control / attitude of family members, friends and others in social environment / which methods have actually been used or are used / opinion / pregnancy when using 'periodical continence' / frequency of sexual contact between husband and wife, satisfaction, initiative etc. / premarital sexual experience / orgasm without intercourse / attitude to sex in the family / attitude to pre- and extra- marital sexual intercourse and masturbation / relation between the partners, happiness in marriage / religious orthodoxy and involvement / attitude to the pope / perception of relation catholics versus non-catholics. Background variables: basic characteristics/ residence/ household characteristics/ occupation/employment/ income/capital assets/ education/ religion