Look at Armin van Buuren, Darude, Jean Michel Jarre etc. For some reason there are many music producers/DJs in their 30s-60s that look way younger than they should ;-) I don't remember who was that but one DJ that was ~42 looked like 18 (non-asian) and everybody was freaking out (I'll try to find that pic somewhere). Maybe this type of music energy activates something in the brain, who knows?

Kind of a nitpick, but electronic != EDM.

I assumed that the meaning here was "people see the way I dress and assume I'm 15 years younger." I expect that anyone frequenting the EDM scene is dressing the part.