Something About Contagious Nose Bleeds

Something was up in my Kindergarten class this afternoon. One student came in late and, as soon as she sat down, had a bloody nose. The Korean teacher was quick to plug it with tissue. Believe it or not, not one but two more students subsequently had nose bleeds within the next five minutes. I've never seen anything like it. As a child I used to get jealous of my friends who had nose bleeds. To this day I have never had one.