The best advice on building relationships with a partner I had to hear from single people, on raising children - from childless counted theorists, on keeping pets from those who are allergic to them, but if they had animals, they know exactly how to keep them properly.
Half-country on the couch better knows how to play football, eating a hamburger with a collie will advise on a healthy lifestyle. My dad knows better than me how to wear spikes, friend - how I should feel in critical days... The country has collapsed, and the stock of advice for 2 generations remains.