Catholic attitudes towards homosexuality have moved some way towards tolerance and respect, but remain distinct from the standard ethic of permissiveness which marks secular culture. This says that if young people want to have sex with each other, that is fine as long as it is legal and there is mutual consent, respect and responsibility. But that falls short of being the right sexual ethic to teach in Catholic schools. This in turn raises the difficult question: how should relationships and sex education be taught in a Catholic secondary school? In particular, what should it say to teenagers about homosexuality? It will teach that every pupil should be treated with dignity, and that homophobia is wrong. But is that enough?