My family were devout Catholics and I went to a convent school for 12 years, so once a year on Ash Wednesday, I had one of these on my face all day.

Sometimes the priest was in a hurry (or very old and shaky), so you would end up with one of these...

...or one of these

 

However it looked, by the end of the day someone on the bus had invariably told you your face was dirty.