In a message dated 5/1/2000 9:14:40 PM Pacific Daylight Time, 
ami@ML.usagi.org writes:

<< If he truly was a man trapped
 in a girls body, why would he care WHAT tsubasa said? 
 (Tsubasa called Ranma-female ugly.)  >>

        Actually, being a conceited, egotistical, and otherwise stubborn guy, 
Ranma would take any challenge, any insult, not only personally, but so much 
more strongly than most folks.  More often than not, Ranma doesn't really 
give a hoot about the challenger, the challenge, or the issues at hand, 
merely that *he can not lose*.  Never, ever, never.  Can't lose, won't let 
himself lose, and being main character will not lose (temporarily, perhaps, 
but ultimately, never).  Ranma don't like being insulted, regardless of the 
insult.  This instance is also the proof some have been searching for when 
they ask, "why does Ranma never think, 'Hey I'm damn sexy!'" or some other 
goofy and badly crafted statement.  Tsubasa basically calls him on that, and 
his immediate response is a 'no way I can lose', not this time because of his 
superior martial arts skills, but because he is confident in his good looks.  
More than that, he is confident in his superior superiority.  Good or bad, it 
is no less true that, Ranma *knows* (I'd say thinks, but dammit he knows it) 
he is better.  Just the way his is.
        Y'know I always wanted to see Kuno get hung up on Tsubasa, that 
would've been hilarious, considering each of them having, uh, issues with 
reality.