A woman asked Stephen Hawking to dance, and he replied, "I'm not much good, I have two left feet."
"Then how about Karaoke?"
To which he replied, "I have two left throats."
A woman asked Stephen Hawking to dance, and he replied, "I'm not much good, I have two left feet."
"Then how about Karaoke?"
To which he replied, "I have two left throats."
Alright, listen up buttercup. This joke is funny because Stephen Hawking was known to be physically disabled as a result of ALS. So he made a joke about having two left feet. The 'two left throats' part is a play on words, implying he can't sing either.