♥ U, Dad!
We get the feeling that this is the sort of prank a daughter can play on her father. If a son did this, they would immediately be disowned and forced to fend for themselves in the woods, scavenging for edible mushrooms alongside the rats that have turned the dark woods into their habitat.
So, if you’re a daughter and want to play a harmless prank on your dad, fill two glasses with water, then flip them over and place them on top of the kitchen counter. When your dad reads the message, he’ll have no choice but to laugh heartily at the prank you’ve pulled.