A little learning can be...

Commuting in the other day there were three girls discussing an acquaintance's welfare. They were a bit incredulous about the bruise on her cheek being caused by a kiss from her boyfriend. Apparently this had been a very unlucky young lady who had had a string of bad'uns as boyfriends. The three girls briefly speculated on why that should be. "I reckon its because she got good GCSE's" one of them stated authoritatively.