So I was googling around for some quotes about yawning—like I do—and I found this nice little blog about Islamic studies set up by the Ministry of Education of the United Arab Emirates. All the things you can learn there!

Why did the Prophet say that one should hold his hand over the mouth while yawning?

The Prophet said that one should hold his hand over the mouth while yawning because the Satan enters through the open mouth.

The Satan? Through the open mouth? Damn. Bad news, yawners.

And:

Is quarrelling a good habit? If not, why?

No, quarreling is not a good habit because while quarrelling people get angry and start using bad words.

Good to know, MoE of the UAE. And more handy information...

Can you give some examples of the good usage of tongue?

Enjoining what is good, forbidding what is evil, discussing among friends about the blessings of Allah, using kind words while talking to one’s parents, teachers and elders, avoiding indecent language, telling the truth, not being rude while talking to others, teaching Islam to those who don’t know — these are some of the good usages of one’s tongue

Riiiiight.

And then there's this:

Give two examples to show how people tell lies in order to make others laugh?

Joking and mimicry are two examples to show how people tell lies in order to make others laugh. Some jokes are full of lies. April fooling is yet another example.

Some jokes are full of lies. Some people are full of jokes.

And maybe Lindy West is the Satan.

Also, it's Lindy's birthday. Happy birthday, the Satan!