Shaving body hair could be a gender identity or performance thing, or could be related to sports such as swimming or cycling. The report hasn't mentioned especially developed musculature you'd expect from a swimmer, cyclist, or even many professional dancers. It refers to build as slender, but that doesn't necessarily mean he couldn't have been an athlete or dancer.
I hugged my yoga teacher the other month, when I gave her a blanket I'd knit for her baby that wasn't quite here yet, then. Is now. She's a few inches shorter than me and much more slenderly built, mixed race with some Asian heritage, and I know had a background in dance before becoming a yoga teacher with additional teaching qualifications in Aerial (lyra, etc.) Hugging her, you could absolutely feel that she was solid muscle, even with the slightly softer 'looking' curves to her face and body from third trimester pregnancy.
So, being slender and not bulked up doesn't mean unfit or unathletic, and therefore I think it's worth considering that this Doe could have been a dancer or performer. If he was a swimmer or cyclist, I think he'd be shaving everything, so his arms would be shaved too, and they haven't said that, just the legs.
Agree with you,
@cheemsg, I'm really impressed with the amount of avenues of identification they have for this Doe! Only one fingerprint, yes, but I don't think that was for want of trying, and partial DNA, and X-rays, plus toe prints! Whoever handled this Doe's remains really did their best to get everything they could.
Now, the big question is - are there any other 'partial remains' cases that could dovetail neatly with this one within a reasonable radius and timeframe? Given he was found by an interstate, the spread could be pretty large if his killer distributed his remains at intervals while driving through multiple jurisdictions.