Because they crack under pressure.
It might take me a while to get hard, I just got laid this morning.
Because when he asked his wife how many eggs to buy, she said 4!
Any way you want, concrete floors tend to be very hard to crack.
I've been really stressed out lately, I know it's not your fault, but please stop cracking jokes about me
Mary: I'd pay whatever it charged.
Because the police charge you.
I'm bad under pressure!! It's the lamest car joke in the world.
They are both soft and crumble under pressure.