There's nothing quite like a roadtrip to bring a little frisson to your relationship.
Particularly a trip involving roads that are a little less well-known - throw in a spot of indelicate swearing at other drivers, a hearty debate about how fast is too fast and some screaming kids in the back and you've pretty much summed up the classic family roadie.
Thankfully, it seems we mellow with age.
A survey of 23,000 British drivers by AAPopulus found that two-in-three people argue in the car, with 18 to 24-year-olds more likely to fight than the over-65s.
Knowing the way to go was the most popular source of scrapping, with driving too fast, not asking for directions and noisy children following it up. Only the 35-44-year-old age group had a different top argument ignition point: noisy children.