Countingthegreyhairs for pope I say! Her exposition of transubstantiation helps with theological explanations but I think many non Catholics are fascinated by the sexual morality of Catholics ie contraception/ divorce etc This is a very small part of it yet gets all the attention.
I'm a Catholic, baptised, brought up, kids baptised, being brought up etc so what follows is intrinsic in me, rather than learned so possibly doctrinally dubious in places
The core of Catholicism is the absolute respect for the absolute dignity of the human being: this is why the death penalty is as repugnant as abortion, why users/ customers of sex workers are doing wrong etc: but also why the ideal is to "hate the sin/ love the sinner".
The point about sex is that it is a full expression of human love with the possible creation of human life as a logical but not inevitable conclusion. Therefore anything that prevents conception artificially is wrong but to choose to abstain is not.
When we marry we do so for life, irrespective of whta may happen (richer/ poorer etc) so life means life unless there are grounds for considering the marriage was invalid in the first place and so grounds for an annulment (the main grounds for which are non-consummation or emotional immaturity of parties and so inabilityto have made the decision in the first place)
I'm a bit ambivalent about some teachings but they inform my life eg sex before marriage in the context of a loving relationship is rather different from one night stands/ recreational sex.
It seems to me that in an increasingly materialistic world the dignity of each individual as an equally valid person in the eyes of God and an institutional recognition of the danger of arrogance are good things in themselves.
Mass each week is frequently irritating but the communal act of hearing the gospel preached to all people from all backgrounds is a refreshing break from normal concerns and pullsyou back to the core questions of your being.
The institutional conservatism of the Church is not necessarily reflected in all its priests and members: my 81 year old friend who has been a nun for 60 years and has taught in Ireland, England, Nigeria and Kenya would put Tony Benn to shame.
It's no accident that Catholics are so disproportionately represented in the public services: personal aggrandisement/ wealth is not, in itself an end.
To simplify matters too far, Margaret Thatcher could never have been a Catholic an dthe greatest commentator on her, Hugo Young, was a catholic (albeit a human one, with doubts like the rest of us)