There weren't many things in the human world that a fae like Puck had an interest in-he mainly was fascinated by the natural world, like the taste of pumpkins, or the delightful creature known as the platypus, or the ever precious shrike that he compared himself to. The only real difference between humans and fae was that Puck found more enjoyment in pranking humans, as they had a more varied reaction than the fae.
But, oddly, even though he was certain he felt no attraction to humans, he did want to learn about them. Though that might be because his king ordered him to so Puck would maybe curb his homicidal tendencies more (not that his king knew about them, just that Puck was all over him and he needed space). So, maybe following some of the doctors who saved and took lives would be a good start. Maybe they knew if there was a cure for platypus venom. So, here the tall and obnoxious faerie was, waltzing into the health area.
"Hello, 'ello, human doctor! My king, the great Faerie King Oberon, has ordered me, Puck, to observe humans so that I may understand you better, which is quite magnanimous of him! May I join you in observing your duties today?" Puck was sure to get a good grade in pleasing his king, he thought.