What did you do last night? If you woke up with a clear head, I expect you’re one of those priggish, strait-laced Gen Zs. If, on the other hand, you’ve got a creeping hangover and perhaps an unfamiliar person in your bed, welcome to old age. Making generalisations about age cohorts is risky, but the data really do show that over-55s are drinking more, taking more drugs and having more casual sex, as young people do much less. Although this might seem a last hedonistic hurrah, our report suggests an unhappy reason for oldies misbehaving.