I've got a question about the Khajiit's unarmed attacking ability. Somehow, and I don't know how, I was able to attack unarmed one-handed, attacking with the right hand while being able to block with the left hand. It surprised the heck out of me, because I didn't know I could do it. When he blocked, he closed his left hand over his right fist and took the block with his forearm, I guess. Right now, he is wearing steal guantlets, but I don't know if that matters. What that a happy glitch that will never happen again, or is there a way I can get that back, because that totally rocked!
According to the UESP wiki,
If nothing, a shield or a torch is equipped in the left hand, or if a two-handed weapon is equipped, incoming attacks can be blocked by holding the Left Hand (block) control. [emphasis mine]
And the Elder Scrolls wiki says
Block with one-handed weapons is also possible if left hand stays unoccupied. [sic]
While this second reference may imply you need a weapon in your right hand to block, I think the emphasis is on the second part of the sentence - if left hand stays unoccupied.
So it looks like you can block while unarmed after all!
I recently came across this glitch & while experimenting found out how to do it. I was a vampire with vampiric drain equipped in the left hand. I saved & went onto a different game where I wasn't a vampire. When I went back to my first game vampiric drain was not equipped but the hand was held open in fp view. I could then block with my left hand. Did this several times, it worked consistently but the blacking animation is the same as blocking with a dagger
You can use the Dual Wield Parrying mod to block while dual-wielding, unarmed or with a spell in your left hand.