Joking around

My colleagues love to tease and are quick to laugh. Sometimes I don't really get what's so funny, and at other times I join in the fun. Some jokes I've been told over the last few days:

On marriage:
A wealthy Pakistani man returns after a time in America. Stopping in to make a small purchase, he tells the shopkeeper that he's looking for a wife, and where should he begin the search? The shopkeeper returns home and tells his young daughter that a rich man - with a green card - is looking for a wife, and would she maybe want to marry him and go to the US? The daughter agrees, and so wedding planning begins.

After the party, the newlyweds return to the groom's hotel, where he first peels off a toupee, then pulls out his false teeth... and then leans down to unscrew his artificial leg. The bride runs screaming back to her father's house, where she storms in to yell at him: "You didn't tell me he was falling apart!"

On Afghans and Arabs:
Two Afghan men traveled to Jordan. Arriving in the airport, they became separated briefly. One of them stumbled across two Jordanian men arguing - their voices raised, gesturing wildly. The Afghan watched, baffled, for a moment, but soon wandered on and found his friend again. He told him: "Jordanians are strange! You'd never believe what I saw - these two meen were fighting, and even then all they do is yell from the Qur'an!"

(this because most Afghans would encounter Arabic primarily, or exclusively, via readings of the Qur'an, but wouldn't necessarily understand enough to recognize non-religious conversations or arguments from these formal readings.)