Alexa Chung urges girls to cover up

I knew that bonnet and pitchfork ensemble would come in useful one day

But I do know what she means, I get totally by the number of female collegues who wear low slug trousers then you can see underwear poking out the top. I really don't know whats supposed to be attractive about that? {Someone give me a hint please!!!}
Same goes for those oh so witty t-shirt slogans like 'so many boys, so little time' {That one was seen on a 50 year old divorcee work collegue on a night out in a lurid shade of pink ...with rhinestones...she seems to have overlooked the obvious Mrs Robinson connetations.}