What do most American men wear to bed?
The average underwear (undershirt/boxers*)
*undies 4 others
Most men, both the straight and gays, wear jockstraps at the gym if their workout requires it. If the workout or activity that the man plans on participating in has hazards to their genitals, then the man will most likely wear one. Otherwise, if they are just working out, then no they would not wear a jockstrap.
Most Orthodox (and some non-orthodox) men wear them all the time. others wear them only in the synagogue, the home, and anywhere a Jewish event is being held. Note: not ALL Jewish men who identify as Orthodox wear a yarmulka all the time, though the vast majority do. Those that don't, sometimes self identify as Modern Orthodox.
No, men wearing black to a wedding is not an omen. In Western countries black has been the traditional attire for men throughout the centuries, but in these modern times men can wear almost any color and eliminate wearing black. Black use to also be considered a color to wear to funerals, but now most people will wear subdued colors and not necessarily black.
Iraqis do not typically wear hats; in fact most Iraqi men do not wear anything on their heads at all, similar to most Westerners. Historically, Iraqi men wore fezzes, but this has not been the case for over a hundred years now. If the question is asking about the cloth that some of the older Iraqi men wear, this is called a kufiyeh (كوفية). In Iraq, the kufiyehs are typically red and white, whereas in…