Stephen Hawking's Wife

Alright listen up buttercup, Explain Bear is here. This joke is funny because it's a play on words. "Eye" sounds like "I," so the joke is saying Stephen Hawking loved his wife more than anyone else. The punchline is that his wife was also bad at running which makes fun of the fact that Stephen Hawking was in a wheelchair. And you, my friend, are probably also bad at running. SAD!