Marking and damnation

My little brother, who is a philosophy teacher in cégep, wrote this on his Facebook wall: "Correction rhymes with damnation". It was unnoticed by everyone but me. I found it really funny, it reminds me of my time as a teacher, when I spent long evenings, especially at weekends, marking. Some of it I actually enjoyed, but it often felt like damnation. So I think I found a new great unknown line, although I am not certain if correction in English is synonymous to marking.