Fashion DO? or Fashion DON'T?

Was on the train that day, and then came in this bunch of L-A-L-A(as Alex put it), walked in. Literally, making each and every heads on the train turn towards them, including mine..and this is why..(I secretly took picture of that particular one that make head turn..steal my light..ish)

See what he's wearing? Here's a close up...SEE? Its a long pants cum short pants. It's actually a long pants, but it don have the middle part(which is from the thigh til the knee) but it's connected via some connector thingy that has clips and hooks on it...AND..it has like a piece of cloth hanging from its back...something like that...hehe, sorry..i drew it myself...

SO..is this a fashion DO? or fashion DON'T??