Pareidolia is a psychological illusion where a vague stimulus is perceived as significant.  Carl Sagan (not a psychologist, but general smart guy) postulated that humans are “hard-wired” to see faces as a survival technique.  That’s why we see a man on the moon, the Virgin Mary on toast, naked ladies on Rorschach tests, and a surprised face on this coffee lid.

By the way, I got the coffee at McDonald’s.  Normally no one can drag me into one of those, but they’re offering free coffee all day for the next two weeks, no purchase necessary!