Conjugal fidelity is the best rampart against sexually transmitted diseases and AIDS; the conjugal union should be open to life, to which must be added respect for the life of others.
The best motivation for opposing same-sex 'marriage' is love and concern for those with same-sex attraction, even when it’s socially difficult—to point to the fact that gay sex is harmful to health and wellness.
The research corresponds to a study published in The Lancet last December that found that rates for various cancers skyrocketed for men engaging in homosexual activity.