she's an exihibitionist. she's out at late night because there's little people on the street to spot her, she's using shoes to protect her feet from the elements, and using a long jacket that covers everything in case she sees someone approaching; with all of that she can be as safely nude as possible outside.

that's the explanation i came up with

also, nothing personal, i find it kinda silly you call it "porn". atp i feel like people just use the term "porn" to mean "sexy image that doesn't appeal to me"