» Fri Dec 03, 2010 10:36 am
It is likely they can have six, but not for the purpose of reproduction. The daedra, when they die, just need to get out of the waters of Oblivion, which is why, as seti18 pointed out, they hang with the princes in order to make the process of coming back out much faster so they don't lose their sanity. For how bad the waters of Oblivion are, imagine being deprived of all your senses, save for a constant and maddening chill that never goes away, and you are aware the whole time.
If you played the SI main quest, you get this tidbit from the Saints/Seducers.
EDIT: http://www.imperial-library.info/content/oblivion-spirit-daedra is a letter or message written by a Dremora, and it notes a bunch of your questions.