Research has found that couples who argue (and get over it) are more likely to stay together than those who avoid conflict. But how can you argue safely?
Is it wrong to flirt with other people? Do you have to agree on politics? And is it all about sex? Therapists examine the truths and myths of relationship lore
The right kind of argument can apparently bring couples closer together. Is bickering about the bread bin a good start, writes Guardian columnist Emma Beddington