Why would they fight? Well, remember when Akane ate that super soba, she
went out and challenged everybody, so Akane sparring Ranma would be
something that is possible. I think that at times, Akane wish she had
Ranma's abilities, and now she does, she would be wanting to show them
off. Most probably by teasing Ranma, and making him feel what she felt
like everytime they sparred. Ranma, being too macho, would never turn
down a challenge, so they fight. Here's a senerio of what is most
probably going through their minds...  if you want to use this, sure, go
ahead. I had to fight back the urge to make Ranma yell at Akane, "Woo

<snip>

	Hmmmm...this brings up an interesting question:  who would be
better were they to switch bodies?  Sure, Akane now has the better body (I
will refer to the person, not the body as bearing the name), but would
that actually make her a better artist?
	Attacks themselves may be easier to handle, quicker, and more
simply executed, but the the most important part of a fighter's anatomy is
his mind.  This has been proven many times by Ranma himself.  Many of the
Ranma eposodes deal with Ranma figuring out a way to respond to a new
challenge in the field of fighting.  He is very inteligent at this if
nothing else.  Would the reader not think that Ranma would not quickly
adapt to his different body, and quickly become better than Akane?  Or
would Akane simply just have the upper hand?  Personally, I think it would
be the former, however, I am open if anybody wants to point out
differently.