Sorry Kun-kun, but Pantyhose's curse(s) work differently than Ranma's.

Well, if you could produce some evidence to back this up, it would be
nice ... otherwise, it's all opinion.

I have no doubt that if Pantyhose had gotten splashed with "Instant man
spring" water, he would have been turned into a half-man/half-beast.

Opinion...

Ranma's main adtribute is flexibility.  If he had gotten splashed with
spring of drowned octopus water he would have turned into an octopus and he
would gripe about it, but he'd adjust.

Opinion...

Ranma is the master of the "Anything goes" style of living.  He finds the
easiest way to live with whatever and lets it simmer.

What's this got to do with aging?

<snip story>

Well, interesting theory, but none of it is based on the manga, so...
elseworld Ranma story - fine. 

Story based on Ranma 1/2 as shown in the manga, Ranma will age.

Kun-chan...
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