They can sleep in whatever they want just as women can.
Malawi is a hot country and men do wear shorts there.
There sure are! Get any shorts that are labeled as wrinkle-free and they should travel great.
Cool borad shorts. Never a speedo!
Yes! And they should. With shorts, dresses and jeans. Do it.
You should try using Eastbay for this. You can order a catalog or visit their website. From them you can order shorts in bulk and even have them customized.
Teachers are expected to dress professionally. Shorts are not considered professional. In some schools, long shorts are allowed. This is usually in southern climates.
It should be fairly easy for you to find some men's spandex running shorts online. I have found that they are available on sites such as Amazon, EBay, Sears, Footlocker and SwimOutlet
They should roughly sleep around 10 hours per day.
All sorts of companies make shorts for men, ranging from denim shorts to athletic shorts. Some brands to try include Nike, Old Navy, The Gap, and American Eagle.