Consider the Following "Jokes

Essay

Consider the following "jokes":
o Q: What's the difference between men and government bonds? A: Bonds mature.
o Q: What is gross stupidity? A: 144 men in a room.
o Q: Why can't a blonde make Kool Aid? A: She can't fit two gallons of water into that little package.
o Q: What's a sure way to drown a blonde? A: Stick a scratch and sniff sticker on the bottom of a pool.
A sociologist would say that while all four jokes are expressions of sex-based discrimination, only two of them can be regarded as expressions of sexism in contemporary US society. Which two jokes, and why?