Here's a bit of ammunition for you if you have an older sibling...
It turns out the eldest siblings are often the worst drivers, according to research from Privilege Car Insurance in the U.K.
The study looked at 1,395 drivers' habits and it found that the vast majority(89%) of older siblings are more likely to speed.
35% of these, (in the U.K.), received speeding fines as a result.
Over a fifth of those surveyed have ended up in minor accidents, while 15% were in more serious collisions.