From whence came the expression "summer colds are the worst"? I have a summer cold. For three days now I've felt like it would be a kindness to shoot me in the head. When I tell people I have a cold, they reply, "Summer colds are the worst" and I reply, "YES! YES!"
But I don't remember ever hearing this before, and I don't remember ever having a cold in summer before.
It must be like when you learn a new word, and then you hear it all the time.