'Vampire Test'
Something interesting that I came across while reading the book 'Show your work' by @austinkleon

A little context-

Picasso used to completely drain out a person of all his energies when he met them. One would have a great time hanging all day with Picasso but would be completely exhausted by the end of the day, not able to do anything.

And well for Picasso, he used to feed on the energy that he sucked and paint all night!