Sad: Duuude...
Happy: Duuuude!
Excited: Duuuuude!!!!
Mad: Dude!
Disappointed: dude
To male friends: Dude
To female friends: Dude
To your significant other: Dude
Yes it should. Kind of in the same way that it should be "I couldn't care less" instead of "I could care less" which I've seen a lot more in recent years.
I think it probably has far more to do with phonetics and the ways different sounds carry emotion than with the gender identity we insist upon associating with specific words
That's cause the male version is DUUUDE!
Duuuuuuuuude is universal.
Sad: Duuude...
Happy: Duuuude!
Excited: Duuuuude!!!!
Mad: Dude!
Disappointed: dude
To male friends: Dude
To female friends: Dude
To your significant other: Dude
And not-gendered.
I’m a dude, you’re a dude, she’s a dude, we’re all dudes now.
or Duder, or El Duderino,....
Just gonna leave this here. https://www.youtube.com/watch?v=gSh7EcVdnvk