I have seen no evidence suggesting that if I, as a gay man, were allowed to marry my partner, Max we haven't decided that we would marry even if we had that option, but we want to have that choice if we had that option and if other gay people had that option, heterosexual couples would suddenly start having fewer children.
Or je n'ai rien vu qui me laisse croire que les couples hétérosexuels commenceraient à faire moins d'enfants si moi, un homme gai, je pouvais épouser mon partenaire Max. Nous n'avons pas décidé si nous nous marierons, si nous en avons la possibilité, mais nous voulons avoir ce choix.